137397499 has 2 divisors, whose sum is σ = 137397500. Its totient is φ = 137397498.

The previous prime is 137397457. The next prime is 137397517. The reversal of 137397499 is 994793731.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (994793731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137397499 - 2²⁵ = 103843067 is a prime.

It is not a weakly prime, because it can be changed into another prime (137397409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68698749 + 68698750.

It is an arithmetic number, because the mean of its divisors is an integer number (68698750).

Almost surely, 2^137397499 is an apocalyptic number.

137397499 is a deficient number, since it is larger than the sum of its proper divisors (1).

137397499 is an equidigital number, since it uses as much as digits as its factorization.

137397499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 52.

The square root of 137397499 is about 11721.6679273899. The cubic root of 137397499 is about 516.0117716101.

The spelling of 137397499 in words is "one hundred thirty-seven million, three hundred ninety-seven thousand, four hundred ninety-nine".