869931187442 has 4 divisors (see below), whose sum is σ = 1304896781166. Its totient is φ = 434965593720.

The previous prime is 869931187441. The next prime is 869931187471. The reversal of 869931187442 is 244781139968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 869931155401 + 32041 = 932701^2 + 179^2 .

It is not an unprimeable number, because it can be changed into a prime (869931187441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217482796859 + ... + 217482796862.

Almost surely, 2^869931187442 is an apocalyptic number.

869931187442 is a deficient number, since it is larger than the sum of its proper divisors (434965593724).

869931187442 is a wasteful number, since it uses less digits than its factorization.

869931187442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434965593723.

The product of its digits is 20901888, while the sum is 62.

The spelling of 869931187442 in words is "eight hundred sixty-nine billion, nine hundred thirty-one million, one hundred eighty-seven thousand, four hundred forty-two".