137628979 has 2 divisors, whose sum is σ = 137628980. Its totient is φ = 137628978.

The previous prime is 137628971. The next prime is 137629003. The reversal of 137628979 is 979826731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137628979 - 2³ = 137628971 is a prime.

It is not a weakly prime, because it can be changed into another prime (137628971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68814489 + 68814490.

It is an arithmetic number, because the mean of its divisors is an integer number (68814490).

Almost surely, 2^137628979 is an apocalyptic number.

137628979 is a deficient number, since it is larger than the sum of its proper divisors (1).

137628979 is an equidigital number, since it uses as much as digits as its factorization.

137628979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 137628979 is about 11731.5377934864. The cubic root of 137628979 is about 516.3013920896.

The spelling of 137628979 in words is "one hundred thirty-seven million, six hundred twenty-eight thousand, nine hundred seventy-nine".