869204961 has 24 divisors (see below), whose sum is σ = 1289977416. Its totient is φ = 563650560.

The previous prime is 869204957. The next prime is 869205011. The reversal of 869204961 is 169402968.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46662561 + 822542400 = 6831^2 + 28680^2 .

It is not a de Polignac number, because 869204961 - 2² = 869204957 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (869208961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126921 + ... + 133593.

It is an arithmetic number, because the mean of its divisors is an integer number (53749059).

Almost surely, 2^869204961 is an apocalyptic number.

It is an amenable number.

869204961 is a deficient number, since it is larger than the sum of its proper divisors (420772455).

869204961 is a wasteful number, since it uses less digits than its factorization.

869204961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073 (or 7070 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 869204961 is about 29482.2821538632. The cubic root of 869204961 is about 954.3493868143.

The spelling of 869204961 in words is "eight hundred sixty-nine million, two hundred four thousand, nine hundred sixty-one".