869472021 has 32 divisors (see below), whose sum is σ = 1349415936. Its totient is φ = 492128000.

The previous prime is 869472017. The next prime is 869472029. The reversal of 869472021 is 120274968.

It is a cyclic number.

It is not a de Polignac number, because 869472021 - 2² = 869472017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869472029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67576 + ... + 79406.

It is an arithmetic number, because the mean of its divisors is an integer number (42169248).

Almost surely, 2^869472021 is an apocalyptic number.

It is an amenable number.

869472021 is a deficient number, since it is larger than the sum of its proper divisors (479943915).

869472021 is a wasteful number, since it uses less digits than its factorization.

869472021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11993.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 869472021 is about 29486.8109669391. The cubic root of 869472021 is about 954.4471169089.

The spelling of 869472021 in words is "eight hundred sixty-nine million, four hundred seventy-two thousand, twenty-one".