137660857 has 2 divisors, whose sum is σ = 137660858. Its totient is φ = 137660856.

The previous prime is 137660851. The next prime is 137660881. The reversal of 137660857 is 758066731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98485776 + 39175081 = 9924^2 + 6259^2 .

It is a cyclic number.

It is not a de Polignac number, because 137660857 - 2¹⁵ = 137628089 is a prime.

It is not a weakly prime, because it can be changed into another prime (137660851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68830428 + 68830429.

It is an arithmetic number, because the mean of its divisors is an integer number (68830429).

Almost surely, 2^137660857 is an apocalyptic number.

It is an amenable number.

137660857 is a deficient number, since it is larger than the sum of its proper divisors (1).

137660857 is an equidigital number, since it uses as much as digits as its factorization.

137660857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 137660857 is about 11732.8963602343. The cubic root of 137660857 is about 516.3412513919.

The spelling of 137660857 in words is "one hundred thirty-seven million, six hundred sixty thousand, eight hundred fifty-seven".