13981975 has 24 divisors (see below), whose sum is σ = 20023520. Its totient is φ = 9486720.

The previous prime is 13981969. The next prime is 13981991. The reversal of 13981975 is 57918931.

It is not a de Polignac number, because 13981975 - 2¹⁵ = 13949207 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 18709 + ... + 19441.

Almost surely, 2^13981975 is an apocalyptic number.

13981975 is a deficient number, since it is larger than the sum of its proper divisors (6041545).

13981975 is a wasteful number, since it uses less digits than its factorization.

13981975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 854 counting only the distinct ones).

The product of its digits is 68040, while the sum is 43.

The square root of 13981975 is about 3739.2479190340. The cubic root of 13981975 is about 240.9107467226.

The spelling of 13981975 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred seventy-five".