397909793 has 2 divisors, whose sum is σ = 397909794. Its totient is φ = 397909792.

The previous prime is 397909763. The next prime is 397909823.

It is a happy number.

397909793 is nontrivially palindromic in base 10.

It is a balanced prime because it is at equal distance from previous prime (397909763) and next prime (397909823).

It can be written as a sum of positive squares in only one way, i.e., 397085329 + 824464 = 19927^2 + 908^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 397909793 - 2⁸ = 397909537 is a prime.

It is not a weakly prime, because it can be changed into another prime (397909753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198954896 + 198954897.

It is an arithmetic number, because the mean of its divisors is an integer number (198954897).

Almost surely, 2^397909793 is an apocalyptic number.

It is an amenable number.

397909793 is a deficient number, since it is larger than the sum of its proper divisors (1).

397909793 is an equidigital number, since it uses as much as digits as its factorization.

397909793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2893401, while the sum is 56.

The square root of 397909793 is about 19947.6763809723. The cubic root of 397909793 is about 735.5206596715.

The spelling of 397909793 in words is "three hundred ninety-seven million, nine hundred nine thousand, seven hundred ninety-three".