13517997 has 8 divisors (see below), whose sum is σ = 18807744. Its totient is φ = 8620128.

The previous prime is 13517993. The next prime is 13518013. The reversal of 13517997 is 79971531.

13517997 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13517997 - 2² = 13517993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13517993) 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, 97888 + ... + 98025.

It is an arithmetic number, because the mean of its divisors is an integer number (2350968).

Almost surely, 2^13517997 is an apocalyptic number.

It is an amenable number.

13517997 is a deficient number, since it is larger than the sum of its proper divisors (5289747).

13517997 is a wasteful number, since it uses less digits than its factorization.

13517997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195939.

The product of its digits is 59535, while the sum is 42.

The square root of 13517997 is about 3676.6828799884. The cubic root of 13517997 is about 238.2159199106.

The spelling of 13517997 in words is "thirteen million, five hundred seventeen thousand, nine hundred ninety-seven".