13756013 has 4 divisors (see below), whose sum is σ = 13787100. Its totient is φ = 13724928.

The previous prime is 13755997. The next prime is 13756021. The reversal of 13756013 is 31065731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31065731 = 47 ⋅660973.

It can be written as a sum of positive squares in 2 ways, for example, as 11202409 + 2553604 = 3347^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 13756013 - 2⁴ = 13755997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13756073) 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, 14870 + ... + 15767.

It is an arithmetic number, because the mean of its divisors is an integer number (3446775).

Almost surely, 2^13756013 is an apocalyptic number.

It is an amenable number.

13756013 is a deficient number, since it is larger than the sum of its proper divisors (31087).

13756013 is an equidigital number, since it uses as much as digits as its factorization.

13756013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31086.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 13756013 is about 3708.9099476800. The cubic root of 13756013 is about 239.6059099548.

The spelling of 13756013 in words is "thirteen million, seven hundred fifty-six thousand, thirteen".