13633971 has 8 divisors (see below), whose sum is σ = 19577040. Its totient is φ = 8390112.

The previous prime is 13633943. The next prime is 13633979. The reversal of 13633971 is 17933631.

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

It is not a de Polignac number, because 13633971 - 2⁷ = 13633843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13633979) 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, 174756 + ... + 174833.

It is an arithmetic number, because the mean of its divisors is an integer number (2447130).

Almost surely, 2^13633971 is an apocalyptic number.

13633971 is a deficient number, since it is larger than the sum of its proper divisors (5943069).

13633971 is a wasteful number, since it uses less digits than its factorization.

13633971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349605.

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

The square root of 13633971 is about 3692.4207506729. The cubic root of 13633971 is about 238.8952173393.

The spelling of 13633971 in words is "thirteen million, six hundred thirty-three thousand, nine hundred seventy-one".