397382771 has 2 divisors, whose sum is σ = 397382772. Its totient is φ = 397382770.

The previous prime is 397382761. The next prime is 397382773. The reversal of 397382771 is 177283793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397382771 - 2¹⁸ = 397120627 is a prime.

Together with 397382773, 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 (397382773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198691385 + 198691386.

It is an arithmetic number, because the mean of its divisors is an integer number (198691386).

Almost surely, 2^397382771 is an apocalyptic number.

397382771 is a deficient number, since it is larger than the sum of its proper divisors (1).

397382771 is an equidigital number, since it uses as much as digits as its factorization.

397382771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The square root of 397382771 is about 19934.4618939163. The cubic root of 397382771 is about 735.1957896968.

The spelling of 397382771 in words is "three hundred ninety-seven million, three hundred eighty-two thousand, seven hundred seventy-one".