869977131 has 4 divisors (see below), whose sum is σ = 1159969512. Its totient is φ = 579984752.

The previous prime is 869977127. The next prime is 869977217. The reversal of 869977131 is 131779968.

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

It is a cyclic number.

It is not a de Polignac number, because 869977131 - 2² = 869977127 is a prime.

It is a super-2 number, since 2×869977131² = 1513720416925982322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (869977331) 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 3 ways as a sum of consecutive naturals, for example, 144996186 + ... + 144996191.

It is an arithmetic number, because the mean of its divisors is an integer number (289992378).

Almost surely, 2^869977131 is an apocalyptic number.

869977131 is a deficient number, since it is larger than the sum of its proper divisors (289992381).

869977131 is a wasteful number, since it uses less digits than its factorization.

869977131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289992380.

The product of its digits is 571536, while the sum is 51.

The square root of 869977131 is about 29495.3747391010. The cubic root of 869977131 is about 954.6319062388.

The spelling of 869977131 in words is "eight hundred sixty-nine million, nine hundred seventy-seven thousand, one hundred thirty-one".