12899657 has 4 divisors (see below), whose sum is σ = 12978960. Its totient is φ = 12820356.

The previous prime is 12899647. The next prime is 12899659. The reversal of 12899657 is 75699821.

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 an emirpimes, since its reverse is a distinct semiprime: 75699821 = 5693 ⋅13297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12899657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12899659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39407 + ... + 39732.

It is an arithmetic number, because the mean of its divisors is an integer number (3244740).

Almost surely, 2^12899657 is an apocalyptic number.

It is an amenable number.

12899657 is a deficient number, since it is larger than the sum of its proper divisors (79303).

12899657 is an equidigital number, since it uses as much as digits as its factorization.

12899657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79302.

The product of its digits is 272160, while the sum is 47.

The square root of 12899657 is about 3591.6092493477. The cubic root of 12899657 is about 234.5269312271.

The spelling of 12899657 in words is "twelve million, eight hundred ninety-nine thousand, six hundred fifty-seven".