1387976334631 has 24 divisors (see below), whose sum is σ = 1503795473744. Its totient is φ = 1280528040960.

The previous prime is 1387976334617. The next prime is 1387976334643. The reversal of 1387976334631 is 1364336797831.

It is not a de Polignac number, because 1387976334631 - 2²⁹ = 1387439463719 is a prime.

It is a super-2 number, since 2×1387976334631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387976334631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387976334601) 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, 3237001 + ... + 3640621.

Almost surely, 2^{1387976334631} is an apocalyptic number.

1387976334631 is a deficient number, since it is larger than the sum of its proper divisors (115819139113).

1387976334631 is a wasteful number, since it uses less digits than its factorization.

1387976334631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403891 (or 403874 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 61.

The spelling of 1387976334631 in words is "one trillion, three hundred eighty-seven billion, nine hundred seventy-six million, three hundred thirty-four thousand, six hundred thirty-one".