13136731 has 4 divisors (see below), whose sum is σ = 13149864. Its totient is φ = 13123600.

The previous prime is 13136713. The next prime is 13136737. The reversal of 13136731 is 13763131.

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 13136731 - 2⁷ = 13136603 is a prime.

It is a super-2 number, since 2×13136731² = 345147402732722, 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 = 13136696 and 13136705.

It is not an unprimeable number, because it can be changed into a prime (13136737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4930 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (3287466).

Almost surely, 2^13136731 is an apocalyptic number.

13136731 is a deficient number, since it is larger than the sum of its proper divisors (13133).

13136731 is a wasteful number, since it uses less digits than its factorization.

13136731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132.

The product of its digits is 1134, while the sum is 25.

The square root of 13136731 is about 3624.4628567555. The cubic root of 13136731 is about 235.9549552543.

Adding to 13136731 its reverse (13763131), we get a palindrome (26899862).

The spelling of 13136731 in words is "thirteen million, one hundred thirty-six thousand, seven hundred thirty-one".