137442931 has 2 divisors, whose sum is σ = 137442932. Its totient is φ = 137442930.

The previous prime is 137442923. The next prime is 137442959. The reversal of 137442931 is 139244731.

It is a weak prime.

It is an emirp because it is prime and its reverse (139244731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137442931 - 2³ = 137442923 is a prime.

It is a super-2 number, since 2×137442931² = 37781118563741522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137442911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68721465 + 68721466.

It is an arithmetic number, because the mean of its divisors is an integer number (68721466).

Almost surely, 2^137442931 is an apocalyptic number.

137442931 is a deficient number, since it is larger than the sum of its proper divisors (1).

137442931 is an equidigital number, since it uses as much as digits as its factorization.

137442931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 137442931 is about 11723.6057166727. The cubic root of 137442931 is about 516.0686403390.

The spelling of 137442931 in words is "one hundred thirty-seven million, four hundred forty-two thousand, nine hundred thirty-one".