13660631 has 4 divisors (see below), whose sum is σ = 13671000. Its totient is φ = 13650264.

The previous prime is 13660609. The next prime is 13660637. The reversal of 13660631 is 13606631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 13606631 = 827 ⋅16453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13660631 is a prime.

It is a super-2 number, since 2×13660631² = 373225678636322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13660631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660637) 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 3 ways as a sum of consecutive naturals, for example, 2861 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (3417750).

Almost surely, 2^13660631 is an apocalyptic number.

13660631 is a deficient number, since it is larger than the sum of its proper divisors (10369).

13660631 is an equidigital number, since it uses as much as digits as its factorization.

13660631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13660631 is about 3696.0290853834. The cubic root of 13660631 is about 239.0508286355.

The spelling of 13660631 in words is "thirteen million, six hundred sixty thousand, six hundred thirty-one".