310242139 has 2 divisors, whose sum is σ = 310242140. Its totient is φ = 310242138.

The previous prime is 310242137. The next prime is 310242143. The reversal of 310242139 is 931242013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 310242139 - 2¹ = 310242137 is a prime.

It is a super-2 number, since 2×310242139² = 192500369622590642, which contains 22 as substring.

Together with 310242137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (310242137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155121069 + 155121070.

It is an arithmetic number, because the mean of its divisors is an integer number (155121070).

Almost surely, 2^310242139 is an apocalyptic number.

310242139 is a deficient number, since it is larger than the sum of its proper divisors (1).

310242139 is an equidigital number, since it uses as much as digits as its factorization.

310242139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 310242139 is about 17613.6918049567. The cubic root of 310242139 is about 676.9661114378.

The spelling of 310242139 in words is "three hundred ten million, two hundred forty-two thousand, one hundred thirty-nine".