13620631 has 4 divisors (see below), whose sum is σ = 13823992. Its totient is φ = 13417272.

The previous prime is 13620619. The next prime is 13620641. The reversal of 13620631 is 13602631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13620631 - 2⁹ = 13620119 is a prime.

It is a super-2 number, since 2×13620631² = 371043177676322, 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 (13620601) 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, 101580 + ... + 101713.

It is an arithmetic number, because the mean of its divisors is an integer number (3455998).

Almost surely, 2^13620631 is an apocalyptic number.

13620631 is a deficient number, since it is larger than the sum of its proper divisors (203361).

13620631 is an equidigital number, since it uses as much as digits as its factorization.

13620631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203360.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13620631 is about 3690.6139055718. The cubic root of 13620631 is about 238.8172771670.

The spelling of 13620631 in words is "thirteen million, six hundred twenty thousand, six hundred thirty-one".