12400697 has 2 divisors, whose sum is σ = 12400698. Its totient is φ = 12400696.

The previous prime is 12400691. The next prime is 12400699. The reversal of 12400697 is 79600421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 87616 = 3509^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400697 - 2⁸ = 12400441 is a prime.

It is a super-4 number, since 4×12400697⁴ (a number of 29 digits) contains 4444 as substring.

Together with 12400699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12400691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200348 + 6200349.

It is an arithmetic number, because the mean of its divisors is an integer number (6200349).

Almost surely, 2^12400697 is an apocalyptic number.

It is an amenable number.

12400697 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400697 is an equidigital number, since it uses as much as digits as its factorization.

12400697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 12400697 is about 3521.4623382907. The cubic root of 12400697 is about 231.4632421148.

The spelling of 12400697 in words is "twelve million, four hundred thousand, six hundred ninety-seven".