136540457 has 2 divisors, whose sum is σ = 136540458. Its totient is φ = 136540456.

The previous prime is 136540409. The next prime is 136540477. The reversal of 136540457 is 754045631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124121881 + 12418576 = 11141^2 + 3524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136540457 is a prime.

It is equal to p_7727660 and since 136540457 and 7727660 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (136540477) 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, 68270228 + 68270229.

It is an arithmetic number, because the mean of its divisors is an integer number (68270229).

Almost surely, 2^136540457 is an apocalyptic number.

It is an amenable number.

136540457 is a deficient number, since it is larger than the sum of its proper divisors (1).

136540457 is an equidigital number, since it uses as much as digits as its factorization.

136540457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 136540457 is about 11685.0527170398. The cubic root of 136540457 is about 514.9366271346.

The spelling of 136540457 in words is "one hundred thirty-six million, five hundred forty thousand, four hundred fifty-seven".