13897918 has 8 divisors (see below), whose sum is σ = 20963880. Its totient is φ = 6909960.

The previous prime is 13897913. The next prime is 13897927. The reversal of 13897918 is 81979831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13897913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19053 + ... + 19768.

It is an arithmetic number, because the mean of its divisors is an integer number (2620485).

Almost surely, 2^13897918 is an apocalyptic number.

13897918 is a deficient number, since it is larger than the sum of its proper divisors (7065962).

13897918 is a wasteful number, since it uses less digits than its factorization.

13897918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39002.

The product of its digits is 108864, while the sum is 46.

The square root of 13897918 is about 3727.9911480582. The cubic root of 13897918 is about 240.4270060275.

The spelling of 13897918 in words is "thirteen million, eight hundred ninety-seven thousand, nine hundred eighteen".