13931497 has 4 divisors (see below), whose sum is σ = 13939200. Its totient is φ = 13923796.

The previous prime is 13931473. The next prime is 13931509. The reversal of 13931497 is 79413931.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13931497 - 2¹¹ = 13929449 is a prime.

It is a super-2 number, since 2×13931497² = 388173217322018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13934497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504 + ... + 5302.

It is an arithmetic number, because the mean of its divisors is an integer number (3484800).

Almost surely, 2^13931497 is an apocalyptic number.

It is an amenable number.

13931497 is a deficient number, since it is larger than the sum of its proper divisors (7703).

13931497 is an equidigital number, since it uses as much as digits as its factorization.

13931497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702.

The product of its digits is 20412, while the sum is 37.

The square root of 13931497 is about 3732.4920629520. The cubic root of 13931497 is about 240.6204835718.

The spelling of 13931497 in words is "thirteen million, nine hundred thirty-one thousand, four hundred ninety-seven".