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2643000949 = 12853205633
BaseRepresentation
bin1001110110001000…
…1111111001110101
320211012021100201001
42131202033321311
520403102012244
61114132403301
7122332065061
oct23542177165
96735240631
102643000949
1111369a5806
12619176531
1333174a6b4
141b1036aa1
151070765d4
hex9d88fe75

2643000949 has 4 divisors (see below), whose sum is σ = 2643219436. Its totient is φ = 2642782464.

The previous prime is 2643000923. The next prime is 2643000967. The reversal of 2643000949 is 9490003462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 509946724 + 2133054225 = 22582^2 + 46185^2 .

It is a 4-Lehmer number, since φ(2643000949) divides (2643000949-1)4.

It is a cyclic number.

It is not a de Polignac number, because 2643000949 - 231 = 495517301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643000649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89964 + ... + 115669.

It is an arithmetic number, because the mean of its divisors is an integer number (660804859).

Almost surely, 22643000949 is an apocalyptic number.

It is an amenable number.

2643000949 is a deficient number, since it is larger than the sum of its proper divisors (218487).

2643000949 is a wasteful number, since it uses less digits than its factorization.

2643000949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218486.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 2643000949 is about 51410.1249658080. The cubic root of 2643000949 is about 1382.6081302173.

The spelling of 2643000949 in words is "two billion, six hundred forty-three million, nine hundred forty-nine", and thus it is an aban number.

Divisors: 1 12853 205633 2643000949