12700817 has 2 divisors, whose sum is σ = 12700818. Its totient is φ = 12700816.

The previous prime is 12700799. The next prime is 12700823. The reversal of 12700817 is 71800721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9634816 + 3066001 = 3104^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 12700817 - 2⁸ = 12700561 is a prime.

It is a super-2 number, since 2×12700817² = 322621504934978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12700837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6350408 + 6350409.

It is an arithmetic number, because the mean of its divisors is an integer number (6350409).

Almost surely, 2^12700817 is an apocalyptic number.

It is an amenable number.

12700817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12700817 is an equidigital number, since it uses as much as digits as its factorization.

12700817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 12700817 is about 3563.8205622618. The cubic root of 12700817 is about 233.3156582983.

The spelling of 12700817 in words is "twelve million, seven hundred thousand, eight hundred seventeen".