396966917 has 2 divisors, whose sum is σ = 396966918. Its totient is φ = 396966916.

The previous prime is 396966901. The next prime is 396966923. The reversal of 396966917 is 719669693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360012676 + 36954241 = 18974^2 + 6079^2 .

It is an emirp because it is prime and its reverse (719669693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396966917 - 2⁴ = 396966901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396966217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198483458 + 198483459.

It is an arithmetic number, because the mean of its divisors is an integer number (198483459).

Almost surely, 2^396966917 is an apocalyptic number.

It is an amenable number.

396966917 is a deficient number, since it is larger than the sum of its proper divisors (1).

396966917 is an equidigital number, since it uses as much as digits as its factorization.

396966917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3306744, while the sum is 56.

The square root of 396966917 is about 19924.0286337879. The cubic root of 396966917 is about 734.9392437477.

The spelling of 396966917 in words is "three hundred ninety-six million, nine hundred sixty-six thousand, nine hundred seventeen".