13908631 has 8 divisors (see below), whose sum is σ = 15459984. Its totient is φ = 12405120.

The previous prime is 13908623. The next prime is 13908641. The reversal of 13908631 is 13680931.

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 13908631 - 2³ = 13908623 is a prime.

It is a super-2 number, since 2×13908631² = 386900032588322, 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 = 13908593 and 13908602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13908611) 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 7 ways as a sum of consecutive naturals, for example, 11346 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (1932498).

Almost surely, 2^13908631 is an apocalyptic number.

13908631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13908631 is a deficient number, since it is larger than the sum of its proper divisors (1551353).

13908631 is a wasteful number, since it uses less digits than its factorization.

13908631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23921.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13908631 is about 3729.4277040854. The cubic root of 13908631 is about 240.4887666689.

The spelling of 13908631 in words is "thirteen million, nine hundred eight thousand, six hundred thirty-one".