13631698 has 4 divisors (see below), whose sum is σ = 20447550. Its totient is φ = 6815848.

The previous prime is 13631689. The next prime is 13631707. The reversal of 13631698 is 89613631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89613631 = 47 ⋅1906673.

It is an interprime number because it is at equal distance from previous prime (13631689) and next prime (13631707).

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 908209 = 3567^2 + 953^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407923 + ... + 3407926.

Almost surely, 2^13631698 is an apocalyptic number.

13631698 is a deficient number, since it is larger than the sum of its proper divisors (6815852).

13631698 is an equidigital number, since it uses as much as digits as its factorization.

13631698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815851.

The product of its digits is 23328, while the sum is 37.

The square root of 13631698 is about 3692.1129451846. The cubic root of 13631698 is about 238.8819407229.

The spelling of 13631698 in words is "thirteen million, six hundred thirty-one thousand, six hundred ninety-eight".