136257311 has 2 divisors, whose sum is σ = 136257312. Its totient is φ = 136257310.

The previous prime is 136257271. The next prime is 136257389. The reversal of 136257311 is 113752631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136257311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136287311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68128655 + 68128656.

It is an arithmetic number, because the mean of its divisors is an integer number (68128656).

Almost surely, 2^136257311 is an apocalyptic number.

136257311 is a deficient number, since it is larger than the sum of its proper divisors (1).

136257311 is an equidigital number, since it uses as much as digits as its factorization.

136257311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 136257311 is about 11672.9306945600. The cubic root of 136257311 is about 514.5804368650.

The spelling of 136257311 in words is "one hundred thirty-six million, two hundred fifty-seven thousand, three hundred eleven".