136604131 has 4 divisors (see below), whose sum is σ = 136677672. Its totient is φ = 136530592.

The previous prime is 136604119. The next prime is 136604159. The reversal of 136604131 is 131406631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136604131 - 2¹³ = 136595939 is a prime.

It is a super-2 number, since 2×136604131² = 37321377212530322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136604096 and 136604105.

It is not an unprimeable number, because it can be changed into a prime (136604101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33910 + ... + 37723.

It is an arithmetic number, because the mean of its divisors is an integer number (34169418).

Almost surely, 2^136604131 is an apocalyptic number.

136604131 is a deficient number, since it is larger than the sum of its proper divisors (73541).

136604131 is an equidigital number, since it uses as much as digits as its factorization.

136604131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73540.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 136604131 is about 11687.7769913701. The cubic root of 136604131 is about 515.0166595296.

The spelling of 136604131 in words is "one hundred thirty-six million, six hundred four thousand, one hundred thirty-one".