13337981 has 8 divisors (see below), whose sum is σ = 14136000. Its totient is φ = 12549600.

The previous prime is 13337969. The next prime is 13338007. The reversal of 13337981 is 18973331.

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

It is a cyclic number.

It is not a de Polignac number, because 13337981 - 2⁶ = 13337917 is a prime.

It is a super-2 number, since 2×13337981² = 355803474312722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13337281) 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, 545 + ... + 5193.

It is an arithmetic number, because the mean of its divisors is an integer number (1767000).

Almost surely, 2^13337981 is an apocalyptic number.

It is an amenable number.

13337981 is a deficient number, since it is larger than the sum of its proper divisors (798019).

13337981 is a wasteful number, since it uses less digits than its factorization.

13337981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4819.

The product of its digits is 13608, while the sum is 35.

The square root of 13337981 is about 3652.1200692201. The cubic root of 13337981 is about 237.1537691894.

The spelling of 13337981 in words is "thirteen million, three hundred thirty-seven thousand, nine hundred eighty-one".