13151997 has 8 divisors (see below), whose sum is σ = 19484480. Its totient is φ = 8767980.

The previous prime is 13151989. The next prime is 13152011. The reversal of 13151997 is 79915131.

13151997 is a `hidden beast` number, since 131 + 519 + 9 + 7 = 666.

It is not a de Polignac number, because 13151997 - 2³ = 13151989 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 (13151927) 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, 243529 + ... + 243582.

It is an arithmetic number, because the mean of its divisors is an integer number (2435560).

Almost surely, 2^13151997 is an apocalyptic number.

It is an amenable number.

13151997 is a deficient number, since it is larger than the sum of its proper divisors (6332483).

13151997 is an equidigital number, since it uses as much as digits as its factorization.

13151997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487120 (or 487114 counting only the distinct ones).

The product of its digits is 8505, while the sum is 36.

The square root of 13151997 is about 3626.5682125117. The cubic root of 13151997 is about 236.0463197888.

The spelling of 13151997 in words is "thirteen million, one hundred fifty-one thousand, nine hundred ninety-seven".