13986397 has 4 divisors (see below), whose sum is σ = 14163520. Its totient is φ = 13809276.

The previous prime is 13986391. The next prime is 13986431. The reversal of 13986397 is 79368931.

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 13986397 - 2³ = 13986389 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 (13986391) 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, 88443 + ... + 88600.

It is an arithmetic number, because the mean of its divisors is an integer number (3540880).

Almost surely, 2^13986397 is an apocalyptic number.

It is an amenable number.

13986397 is a deficient number, since it is larger than the sum of its proper divisors (177123).

13986397 is an equidigital number, since it uses as much as digits as its factorization.

13986397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177122.

The product of its digits is 244944, while the sum is 46.

The square root of 13986397 is about 3739.8391676648. The cubic root of 13986397 is about 240.9361412046.

The spelling of 13986397 in words is "thirteen million, nine hundred eighty-six thousand, three hundred ninety-seven".