136787631 has 32 divisors (see below), whose sum is σ = 199910400. Its totient is φ = 82892160.

The previous prime is 136787621. The next prime is 136787657.

136787631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 136787631 - 2¹³ = 136779439 is a prime.

It is a super-2 number, since 2×136787631² = 37421711989184322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136787611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166201 + ... + 167021.

It is an arithmetic number, because the mean of its divisors is an integer number (6247200).

Almost surely, 2^136787631 is an apocalyptic number.

136787631 is a deficient number, since it is larger than the sum of its proper divisors (63122769).

136787631 is a wasteful number, since it uses less digits than its factorization.

136787631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its digits is 127008, while the sum is 42.

The square root of 136787631 is about 11695.6244382248. The cubic root of 136787631 is about 515.2471632279.

The spelling of 136787631 in words is "one hundred thirty-six million, seven hundred eighty-seven thousand, six hundred thirty-one".