13997518 has 8 divisors (see below), whose sum is σ = 21105648. Its totient is φ = 6962304.

The previous prime is 13997497. The next prime is 13997519. The reversal of 13997518 is 81579931.

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 (13997519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17746 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (2638206).

Almost surely, 2^13997518 is an apocalyptic number.

13997518 is a deficient number, since it is larger than the sum of its proper divisors (7108130).

13997518 is a wasteful number, since it uses less digits than its factorization.

13997518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36458.

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

The square root of 13997518 is about 3741.3257008713. The cubic root of 13997518 is about 240.9999827827. Note that the first 4 decimals are identical.

The spelling of 13997518 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred eighteen".