397932701 has 2 divisors, whose sum is σ = 397932702. Its totient is φ = 397932700.

The previous prime is 397932677. The next prime is 397932721. The reversal of 397932701 is 107239793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315595225 + 82337476 = 17765^2 + 9074^2 .

It is an emirp because it is prime and its reverse (107239793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397932701 - 2²⁶ = 330823837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397932721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198966350 + 198966351.

It is an arithmetic number, because the mean of its divisors is an integer number (198966351).

Almost surely, 2^397932701 is an apocalyptic number.

It is an amenable number.

397932701 is a deficient number, since it is larger than the sum of its proper divisors (1).

397932701 is an equidigital number, since it uses as much as digits as its factorization.

397932701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 397932701 is about 19948.2505749251. The cubic root of 397932701 is about 735.5347742474.

The spelling of 397932701 in words is "three hundred ninety-seven million, nine hundred thirty-two thousand, seven hundred one".