869138994 has 16 divisors (see below), whose sum is σ = 1740738240. Its totient is φ = 289302960.

The previous prime is 869138987. The next prime is 869139001. The reversal of 869138994 is 499831968.

It is an interprime number because it is at equal distance from previous prime (869138987) and next prime (869139001).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97902 + ... + 106409.

It is an arithmetic number, because the mean of its divisors is an integer number (108796140).

Almost surely, 2^869138994 is an apocalyptic number.

869138994 is an abundant number, since it is smaller than the sum of its proper divisors (871599246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869138994 is a wasteful number, since it uses less digits than its factorization.

869138994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205025.

The product of its digits is 3359232, while the sum is 57.

The square root of 869138994 is about 29481.1633759592. The cubic root of 869138994 is about 954.3252432343.

The spelling of 869138994 in words is "eight hundred sixty-nine million, one hundred thirty-eight thousand, nine hundred ninety-four".