310971139 has 2 divisors, whose sum is σ = 310971140. Its totient is φ = 310971138.

The previous prime is 310971121. The next prime is 310971161. The reversal of 310971139 is 931179013.

It is a weak prime.

It is an emirp because it is prime and its reverse (931179013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 310971139 - 2²³ = 302582531 is a prime.

It is not a weakly prime, because it can be changed into another prime (310971169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155485569 + 155485570.

It is an arithmetic number, because the mean of its divisors is an integer number (155485570).

Almost surely, 2^310971139 is an apocalyptic number.

310971139 is a deficient number, since it is larger than the sum of its proper divisors (1).

310971139 is an equidigital number, since it uses as much as digits as its factorization.

310971139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 310971139 is about 17634.3737909799. The cubic root of 310971139 is about 677.4959365778.

The spelling of 310971139 in words is "three hundred ten million, nine hundred seventy-one thousand, one hundred thirty-nine".