31347277387 has 2 divisors, whose sum is σ = 31347277388. Its totient is φ = 31347277386.

The previous prime is 31347277303. The next prime is 31347277453. The reversal of 31347277387 is 78377274313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31347277387 is a prime.

It is not a weakly prime, because it can be changed into another prime (31342277387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15673638693 + 15673638694.

It is an arithmetic number, because the mean of its divisors is an integer number (15673638694).

Almost surely, 2^31347277387 is an apocalyptic number.

31347277387 is a deficient number, since it is larger than the sum of its proper divisors (1).

31347277387 is an equidigital number, since it uses as much as digits as its factorization.

31347277387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 52.

The spelling of 31347277387 in words is "thirty-one billion, three hundred forty-seven million, two hundred seventy-seven thousand, three hundred eighty-seven".