137530979 has 2 divisors, whose sum is σ = 137530980. Its totient is φ = 137530978.

The previous prime is 137530957. The next prime is 137531011. The reversal of 137530979 is 979035731.

It is a weak prime.

It is an emirp because it is prime and its reverse (979035731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137530979 - 2²⁰ = 136482403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137530579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68765489 + 68765490.

It is an arithmetic number, because the mean of its divisors is an integer number (68765490).

Almost surely, 2^137530979 is an apocalyptic number.

137530979 is a deficient number, since it is larger than the sum of its proper divisors (1).

137530979 is an equidigital number, since it uses as much as digits as its factorization.

137530979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 44.

The square root of 137530979 is about 11727.3602741623. The cubic root of 137530979 is about 516.1788172486.

The spelling of 137530979 in words is "one hundred thirty-seven million, five hundred thirty thousand, nine hundred seventy-nine".