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99990111 = 3132563849
BaseRepresentation
bin1011111010110…
…11101001011111
320222011000122110
411331123221133
5201044140421
613531045103
72322621234
oct575335137
9228130573
1099990111
1151495061
12295a0793
131793c160
14d3cb78b
158ba1a76
hex5f5ba5f

99990111 has 8 divisors (see below), whose sum is σ = 143575600. Its totient is φ = 61532352.

The previous prime is 99990091. The next prime is 99990113. The reversal of 99990111 is 11109999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99990111 - 27 = 99989983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2563849 = 99990111 / (9 + 9 + 9 + 9 + 0 + 1 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99990111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990113) 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 7 ways as a sum of consecutive naturals, for example, 1281886 + ... + 1281963.

It is an arithmetic number, because the mean of its divisors is an integer number (17946950).

Almost surely, 299990111 is an apocalyptic number.

99990111 is a deficient number, since it is larger than the sum of its proper divisors (43585489).

99990111 is a wasteful number, since it uses less digits than its factorization.

99990111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563865.

The product of its (nonzero) digits is 6561, while the sum is 39.

The square root of 99990111 is about 9999.5055377754. The cubic root of 99990111 is about 464.1435826329.

The spelling of 99990111 in words is "ninety-nine million, nine hundred ninety thousand, one hundred eleven".

Divisors: 1 3 13 39 2563849 7691547 33330037 99990111