869747920389 has 24 divisors (see below), whose sum is σ = 1285573944512. Its totient is φ = 566323228800.

The previous prime is 869747920297. The next prime is 869747920397. The reversal of 869747920389 is 983029747968.

It is not a de Polignac number, because 869747920389 - 2²¹ = 869745823237 is a prime.

It is a super-2 number, since 2×869747920389² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869747922389) 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, 15392589 + ... + 15448989.

Almost surely, 2^869747920389 is an apocalyptic number.

It is an amenable number.

869747920389 is a deficient number, since it is larger than the sum of its proper divisors (415826024123).

869747920389 is a wasteful number, since it uses less digits than its factorization.

869747920389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96297 (or 96294 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 72.

The spelling of 869747920389 in words is "eight hundred sixty-nine billion, seven hundred forty-seven million, nine hundred twenty thousand, three hundred eighty-nine".