12997651 has 2 divisors, whose sum is σ = 12997652. Its totient is φ = 12997650.

The previous prime is 12997637. The next prime is 12997669. The reversal of 12997651 is 15679921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12997651 is a prime.

It is not a weakly prime, because it can be changed into another prime (12997631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6498825 + 6498826.

It is an arithmetic number, because the mean of its divisors is an integer number (6498826).

Almost surely, 2^12997651 is an apocalyptic number.

12997651 is a deficient number, since it is larger than the sum of its proper divisors (1).

12997651 is an equidigital number, since it uses as much as digits as its factorization.

12997651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 12997651 is about 3605.2255130574. The cubic root of 12997651 is about 235.1193056493.

The spelling of 12997651 in words is "twelve million, nine hundred ninety-seven thousand, six hundred fifty-one".