136397057 has 2 divisors, whose sum is σ = 136397058. Its totient is φ = 136397056.

The previous prime is 136397003. The next prime is 136397071. The reversal of 136397057 is 750793631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 1628176 = 11609^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 136397057 - 2¹⁰ = 136396033 is a prime.

It is a super-2 number, since 2×136397057² = 37208314316522498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136397957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68198528 + 68198529.

It is an arithmetic number, because the mean of its divisors is an integer number (68198529).

Almost surely, 2^136397057 is an apocalyptic number.

It is an amenable number.

136397057 is a deficient number, since it is larger than the sum of its proper divisors (1).

136397057 is an equidigital number, since it uses as much as digits as its factorization.

136397057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 41.

The square root of 136397057 is about 11678.9150609121. The cubic root of 136397057 is about 514.7562952887.

The spelling of 136397057 in words is "one hundred thirty-six million, three hundred ninety-seven thousand, fifty-seven".