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864842089 = 2933788493
BaseRepresentation
bin110011100011000…
…111000101101001
32020021100112022111
4303203013011221
53232344421324
6221452322321
730301015336
oct6343070551
92207315274
10864842089
114041a9731
122017733a1
1310a236aa7
1482c0798d
1550dd4794
hex338c7169

864842089 has 8 divisors (see below), whose sum is σ = 897329160. Its totient is φ = 832532736.

The previous prime is 864842063. The next prime is 864842137. The reversal of 864842089 is 980248468.

864842089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2832489 + 862009600 = 1683^2 + 29360^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 864842089 - 27 = 864841961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864842189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34474 + ... + 54019.

It is an arithmetic number, because the mean of its divisors is an integer number (112166145).

Almost surely, 2864842089 is an apocalyptic number.

It is an amenable number.

864842089 is a deficient number, since it is larger than the sum of its proper divisors (32487071).

864842089 is a wasteful number, since it uses less digits than its factorization.

864842089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88859.

The product of its (nonzero) digits is 884736, while the sum is 49.

The square root of 864842089 is about 29408.1976496350. The cubic root of 864842089 is about 952.7499596350.

The spelling of 864842089 in words is "eight hundred sixty-four million, eight hundred forty-two thousand, eighty-nine".

Divisors: 1 29 337 9773 88493 2566297 29822141 864842089