137388971 has 2 divisors, whose sum is σ = 137388972. Its totient is φ = 137388970.

The previous prime is 137388967. The next prime is 137389009. The reversal of 137388971 is 179883731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137388971 - 2² = 137388967 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137388961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68694485 + 68694486.

It is an arithmetic number, because the mean of its divisors is an integer number (68694486).

Almost surely, 2^137388971 is an apocalyptic number.

137388971 is a deficient number, since it is larger than the sum of its proper divisors (1).

137388971 is an equidigital number, since it uses as much as digits as its factorization.

137388971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 137388971 is about 11721.3041509893. The cubic root of 137388971 is about 516.0010954346.

The spelling of 137388971 in words is "one hundred thirty-seven million, three hundred eighty-eight thousand, nine hundred seventy-one".