12981697 has 4 divisors (see below), whose sum is σ = 13049856. Its totient is φ = 12913540.

The previous prime is 12981691. The next prime is 12981733. The reversal of 12981697 is 79618921.

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 12981697 - 2¹⁹ = 12457409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12981691) 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, 33793 + ... + 34174.

It is an arithmetic number, because the mean of its divisors is an integer number (3262464).

Almost surely, 2^12981697 is an apocalyptic number.

It is an amenable number.

12981697 is a deficient number, since it is larger than the sum of its proper divisors (68159).

12981697 is an equidigital number, since it uses as much as digits as its factorization.

12981697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68158.

The product of its digits is 54432, while the sum is 43.

The square root of 12981697 is about 3603.0122120248. The cubic root of 12981697 is about 235.0230669978.

The spelling of 12981697 in words is "twelve million, nine hundred eighty-one thousand, six hundred ninety-seven".