136620687 has 32 divisors (see below), whose sum is σ = 226409472. Its totient is φ = 71483904.

The previous prime is 136620683. The next prime is 136620707. The reversal of 136620687 is 786026631.

It is not a de Polignac number, because 136620687 - 2² = 136620683 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136620683) 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, 8038 + ... + 18380.

It is an arithmetic number, because the mean of its divisors is an integer number (7075296).

Almost surely, 2^136620687 is an apocalyptic number.

136620687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

136620687 is a deficient number, since it is larger than the sum of its proper divisors (89788785).

136620687 is a wasteful number, since it uses less digits than its factorization.

136620687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10407.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 136620687 is about 11688.4852312008. The cubic root of 136620687 is about 515.0374648335.

The spelling of 136620687 in words is "one hundred thirty-six million, six hundred twenty thousand, six hundred eighty-seven".