13891013 has 4 divisors (see below), whose sum is σ = 13898508. Its totient is φ = 13883520.

The previous prime is 13890973. The next prime is 13891037. The reversal of 13891013 is 31019831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10349089 + 3541924 = 3217^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 13891013 - 2⁶ = 13890949 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 (13891063) 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, 1295 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (3474627).

Almost surely, 2^13891013 is an apocalyptic number.

It is an amenable number.

13891013 is a deficient number, since it is larger than the sum of its proper divisors (7495).

13891013 is an equidigital number, since it uses as much as digits as its factorization.

13891013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 13891013 is about 3727.0649310148. The cubic root of 13891013 is about 240.3871817533.

The spelling of 13891013 in words is "thirteen million, eight hundred ninety-one thousand, thirteen".