31287980107 has 2 divisors, whose sum is σ = 31287980108. Its totient is φ = 31287980106.

The previous prime is 31287980083. The next prime is 31287980117. The reversal of 31287980107 is 70108978213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31287980107 is a prime.

It is not a weakly prime, because it can be changed into another prime (31287980117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15643990053 + 15643990054.

It is an arithmetic number, because the mean of its divisors is an integer number (15643990054).

Almost surely, 2^31287980107 is an apocalyptic number.

31287980107 is a deficient number, since it is larger than the sum of its proper divisors (1).

31287980107 is an equidigital number, since it uses as much as digits as its factorization.

31287980107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 31287980107 in words is "thirty-one billion, two hundred eighty-seven million, nine hundred eighty thousand, one hundred seven".