869990055 has 16 divisors (see below), whose sum is σ = 1518528384. Its totient is φ = 421813280.

The previous prime is 869990047. The next prime is 869990059. The reversal of 869990055 is 550099968.

It is not a de Polignac number, because 869990055 - 2³ = 869990047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869990059) 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, 2636169 + ... + 2636498.

It is an arithmetic number, because the mean of its divisors is an integer number (94908024).

Almost surely, 2^869990055 is an apocalyptic number.

869990055 is a deficient number, since it is larger than the sum of its proper divisors (648538329).

869990055 is a wasteful number, since it uses less digits than its factorization.

869990055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272686.

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 869990055 is about 29495.5938234849. The cubic root of 869990055 is about 954.6366334135.

The spelling of 869990055 in words is "eight hundred sixty-nine million, nine hundred ninety thousand, fifty-five".