13632981 has 8 divisors (see below), whose sum is σ = 18308640. Its totient is φ = 9022992.

The previous prime is 13632979. The next prime is 13633001. The reversal of 13632981 is 18923631.

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

It is not a de Polignac number, because 13632981 - 2¹ = 13632979 is a prime.

It is a super-2 number, since 2×13632981² = 371716341892722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13636981) 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, 15930 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (2288580).

Almost surely, 2^13632981 is an apocalyptic number.

It is an amenable number.

13632981 is a deficient number, since it is larger than the sum of its proper divisors (4675659).

13632981 is a wasteful number, since it uses less digits than its factorization.

13632981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32835.

The product of its digits is 7776, while the sum is 33.

The square root of 13632981 is about 3692.2866898441. The cubic root of 13632981 is about 238.8894349205.

The spelling of 13632981 in words is "thirteen million, six hundred thirty-two thousand, nine hundred eighty-one".