31246328947 has 2 divisors, whose sum is σ = 31246328948. Its totient is φ = 31246328946.

The previous prime is 31246328881. The next prime is 31246328957. The reversal of 31246328947 is 74982364213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31246328947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31246328947.

It is not a weakly prime, because it can be changed into another prime (31246328957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15623164473 + 15623164474.

It is an arithmetic number, because the mean of its divisors is an integer number (15623164474).

Almost surely, 2^31246328947 is an apocalyptic number.

31246328947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31246328947 is an equidigital number, since it uses as much as digits as its factorization.

31246328947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The spelling of 31246328947 in words is "thirty-one billion, two hundred forty-six million, three hundred twenty-eight thousand, nine hundred forty-seven".