13397631 has 8 divisors (see below), whose sum is σ = 19237680. Its totient is φ = 8244672.

The previous prime is 13397621. The next prime is 13397647. The reversal of 13397631 is 13679331.

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

It is not a de Polignac number, because 13397631 - 2⁵ = 13397599 is a prime.

It is a super-2 number, since 2×13397631² = 358993032824322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13397592 and 13397601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13397621) 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, 171726 + ... + 171803.

It is an arithmetic number, because the mean of its divisors is an integer number (2404710).

Almost surely, 2^13397631 is an apocalyptic number.

13397631 is a deficient number, since it is larger than the sum of its proper divisors (5840049).

13397631 is a wasteful number, since it uses less digits than its factorization.

13397631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343545.

The product of its digits is 10206, while the sum is 33.

The square root of 13397631 is about 3660.2774485003. The cubic root of 13397631 is about 237.5067757993.

It can be divided in two parts, 13397 and 631, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13397631 in words is "thirteen million, three hundred ninety-seven thousand, six hundred thirty-one".