136531877 has 2 divisors, whose sum is σ = 136531878. Its totient is φ = 136531876.

The previous prime is 136531849. The next prime is 136531883. The reversal of 136531877 is 778135631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92428996 + 44102881 = 9614^2 + 6641^2 .

It is a cyclic number.

It is not a de Polignac number, because 136531877 - 2⁸ = 136531621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136531817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68265938 + 68265939.

It is an arithmetic number, because the mean of its divisors is an integer number (68265939).

Almost surely, 2^136531877 is an apocalyptic number.

It is an amenable number.

136531877 is a deficient number, since it is larger than the sum of its proper divisors (1).

136531877 is an equidigital number, since it uses as much as digits as its factorization.

136531877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 136531877 is about 11684.6855755728. The cubic root of 136531877 is about 514.9258409572.

The spelling of 136531877 in words is "one hundred thirty-six million, five hundred thirty-one thousand, eight hundred seventy-seven".