137440139 has 2 divisors, whose sum is σ = 137440140. Its totient is φ = 137440138.

The previous prime is 137440103. The next prime is 137440141. The reversal of 137440139 is 931044731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137440139 is a prime.

Together with 137440141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137440339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68720069 + 68720070.

It is an arithmetic number, because the mean of its divisors is an integer number (68720070).

Almost surely, 2^137440139 is an apocalyptic number.

137440139 is a deficient number, since it is larger than the sum of its proper divisors (1).

137440139 is an equidigital number, since it uses as much as digits as its factorization.

137440139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 137440139 is about 11723.4866400743. The cubic root of 137440139 is about 516.0651458622.

The spelling of 137440139 in words is "one hundred thirty-seven million, four hundred forty thousand, one hundred thirty-nine".