869418621 has 12 divisors (see below), whose sum is σ = 1271724480. Its totient is φ = 572275080.

The previous prime is 869418617. The next prime is 869418623. The reversal of 869418621 is 126814968.

869418621 is a `hidden beast` number, since 8 + 6 + 9 + 4 + 18 + 621 = 666.

It is not a de Polignac number, because 869418621 - 2² = 869418617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869418623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610695 + ... + 612116.

It is an arithmetic number, because the mean of its divisors is an integer number (105977040).

Almost surely, 2^869418621 is an apocalyptic number.

It is an amenable number.

869418621 is a deficient number, since it is larger than the sum of its proper divisors (402305859).

869418621 is a wasteful number, since it uses less digits than its factorization.

869418621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222896 (or 1222893 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 869418621 is about 29485.9054634583. The cubic root of 869418621 is about 954.4275768822.

The spelling of 869418621 in words is "eight hundred sixty-nine million, four hundred eighteen thousand, six hundred twenty-one".