13981237 has 4 divisors (see below), whose sum is σ = 14088096. Its totient is φ = 13874380.

The previous prime is 13981229. The next prime is 13981243. The reversal of 13981237 is 73218931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13981237 - 2³ = 13981229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981337) 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, 53233 + ... + 53494.

It is an arithmetic number, because the mean of its divisors is an integer number (3522024).

Almost surely, 2^13981237 is an apocalyptic number.

It is an amenable number.

13981237 is a deficient number, since it is larger than the sum of its proper divisors (106859).

13981237 is a wasteful number, since it uses less digits than its factorization.

13981237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106858.

The product of its digits is 9072, while the sum is 34.

The square root of 13981237 is about 3739.1492347859. The cubic root of 13981237 is about 240.9065080448.

The spelling of 13981237 in words is "thirteen million, nine hundred eighty-one thousand, two hundred thirty-seven".