869997090 has 32 divisors (see below), whose sum is σ = 2094325056. Its totient is φ = 231295680.

The previous prime is 869997043. The next prime is 869997091. The reversal of 869997090 is 90799968.

869997090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 869997090.

It is not an unprimeable number, because it can be changed into a prime (869997091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33877 + ... + 53736.

It is an arithmetic number, because the mean of its divisors is an integer number (65447658).

Almost surely, 2^869997090 is an apocalyptic number.

869997090 is an abundant number, since it is smaller than the sum of its proper divisors (1224327966).

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

869997090 is a wasteful number, since it uses less digits than its factorization.

869997090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87954.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 869997090 is about 29495.7130783441. The cubic root of 869997090 is about 954.6392065658.

The spelling of 869997090 in words is "eight hundred sixty-nine million, nine hundred ninety-seven thousand, ninety".