136506631 has 2 divisors, whose sum is σ = 136506632. Its totient is φ = 136506630.

The previous prime is 136506607. The next prime is 136506691. The reversal of 136506631 is 136605631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136506631 - 2⁹ = 136506119 is a prime.

It is a super-2 number, since 2×136506631² = 37268120613940322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136506593 and 136506602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136506691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68253315 + 68253316.

It is an arithmetic number, because the mean of its divisors is an integer number (68253316).

Almost surely, 2^136506631 is an apocalyptic number.

136506631 is a deficient number, since it is larger than the sum of its proper divisors (1).

136506631 is an equidigital number, since it uses as much as digits as its factorization.

136506631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 136506631 is about 11683.6052227042. The cubic root of 136506631 is about 514.8941008258.

The spelling of 136506631 in words is "one hundred thirty-six million, five hundred six thousand, six hundred thirty-one".