13378631 has 8 divisors (see below), whose sum is σ = 15578784. Its totient is φ = 11250720.

The previous prime is 13378619. The next prime is 13378661. The reversal of 13378631 is 13687331.

13378631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13378631 - 2¹⁴ = 13362247 is a prime.

It is a super-2 number, since 2×13378631² = 357975534868322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13378661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17660 + ... + 18401.

It is an arithmetic number, because the mean of its divisors is an integer number (1947348).

Almost surely, 2^13378631 is an apocalyptic number.

13378631 is a deficient number, since it is larger than the sum of its proper divisors (2200153).

13378631 is an equidigital number, since it uses as much as digits as its factorization.

13378631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36121.

The product of its digits is 9072, while the sum is 32.

The square root of 13378631 is about 3657.6810959951. The cubic root of 13378631 is about 237.3944483877.

The spelling of 13378631 in words is "thirteen million, three hundred seventy-eight thousand, six hundred thirty-one".