13923997 has 4 divisors (see below), whose sum is σ = 14091840. Its totient is φ = 13756156.

The previous prime is 13923989. The next prime is 13924013. The reversal of 13923997 is 79932931.

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 13923997 - 2³ = 13923989 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 (13923907) 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, 83797 + ... + 83962.

It is an arithmetic number, because the mean of its divisors is an integer number (3522960).

Almost surely, 2^13923997 is an apocalyptic number.

It is an amenable number.

13923997 is a deficient number, since it is larger than the sum of its proper divisors (167843).

13923997 is an equidigital number, since it uses as much as digits as its factorization.

13923997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167842.

The product of its digits is 91854, while the sum is 43.

The square root of 13923997 is about 3731.4872370142. The cubic root of 13923997 is about 240.5772965985.

The spelling of 13923997 in words is "thirteen million, nine hundred twenty-three thousand, nine hundred ninety-seven".