136638851 has 2 divisors, whose sum is σ = 136638852. Its totient is φ = 136638850.

The previous prime is 136638787. The next prime is 136638857. The reversal of 136638851 is 158836631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136638851 - 2⁶ = 136638787 is a prime.

It is a Chen prime.

It is equal to p_7732958 and since 136638851 and 7732958 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 136638799 and 136638808.

It is not a weakly prime, because it can be changed into another prime (136638857) 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, 68319425 + 68319426.

It is an arithmetic number, because the mean of its divisors is an integer number (68319426).

Almost surely, 2^136638851 is an apocalyptic number.

136638851 is a deficient number, since it is larger than the sum of its proper divisors (1).

136638851 is an equidigital number, since it uses as much as digits as its factorization.

136638851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 136638851 is about 11689.2622093954. The cubic root of 136638851 is about 515.0602889171.

The spelling of 136638851 in words is "one hundred thirty-six million, six hundred thirty-eight thousand, eight hundred fifty-one".