136365731 has 4 divisors (see below), whose sum is σ = 136566072. Its totient is φ = 136165392.

The previous prime is 136365727. The next prime is 136365739. The reversal of 136365731 is 137563631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137563631 = 9463 ⋅14537.

It is a cyclic number.

It is not a de Polignac number, because 136365731 - 2² = 136365727 is a prime.

It is a super-2 number, since 2×136365731² = 37191225182328722, 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 = 136365691 and 136365700.

It is not an unprimeable number, because it can be changed into a prime (136365739) 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, 99146 + ... + 100511.

It is an arithmetic number, because the mean of its divisors is an integer number (34141518).

Almost surely, 2^136365731 is an apocalyptic number.

136365731 is a deficient number, since it is larger than the sum of its proper divisors (200341).

136365731 is an equidigital number, since it uses as much as digits as its factorization.

136365731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200340.

The product of its digits is 34020, while the sum is 35.

The square root of 136365731 is about 11677.5738490493. The cubic root of 136365731 is about 514.7168846379.

The spelling of 136365731 in words is "one hundred thirty-six million, three hundred sixty-five thousand, seven hundred thirty-one".