137439023 has 2 divisors, whose sum is σ = 137439024. Its totient is φ = 137439022.

The previous prime is 137439013. The next prime is 137439061. The reversal of 137439023 is 320934731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137439023 - 2⁸ = 137438767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137439013) 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, 68719511 + 68719512.

It is an arithmetic number, because the mean of its divisors is an integer number (68719512).

Almost surely, 2^137439023 is an apocalyptic number.

137439023 is a deficient number, since it is larger than the sum of its proper divisors (1).

137439023 is an equidigital number, since it uses as much as digits as its factorization.

137439023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 137439023 is about 11723.4390432159. The cubic root of 137439023 is about 516.0637490595.

The spelling of 137439023 in words is "one hundred thirty-seven million, four hundred thirty-nine thousand, twenty-three".