31682976947 has 2 divisors, whose sum is σ = 31682976948. Its totient is φ = 31682976946.

The previous prime is 31682976943. The next prime is 31682976967. The reversal of 31682976947 is 74967928613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31682976947 - 2² = 31682976943 is a prime.

It is a super-2 number, since 2×31682976947² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31682976947.

It is not a weakly prime, because it can be changed into another prime (31682976943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15841488473 + 15841488474.

It is an arithmetic number, because the mean of its divisors is an integer number (15841488474).

Almost surely, 2^31682976947 is an apocalyptic number.

31682976947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31682976947 is an equidigital number, since it uses as much as digits as its factorization.

31682976947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 62.

The spelling of 31682976947 in words is "thirty-one billion, six hundred eighty-two million, nine hundred seventy-six thousand, nine hundred forty-seven".