30976977431 has 4 divisors (see below), whose sum is σ = 32799152592. Its totient is φ = 29154802272.

The previous prime is 30976977401. The next prime is 30976977439. The reversal of 30976977431 is 13477967903.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30976977431 is a prime.

It is a super-2 number, since 2×30976977431² (a number of 22 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 (30976977439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911087555 + ... + 911087588.

It is an arithmetic number, because the mean of its divisors is an integer number (8199788148).

Almost surely, 2^30976977431 is an apocalyptic number.

30976977431 is a deficient number, since it is larger than the sum of its proper divisors (1822175161).

30976977431 is a wasteful number, since it uses less digits than its factorization.

30976977431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822175160.

The product of its (nonzero) digits is 6001128, while the sum is 56.

The spelling of 30976977431 in words is "thirty billion, nine hundred seventy-six million, nine hundred seventy-seven thousand, four hundred thirty-one".