397423973 has 2 divisors, whose sum is σ = 397423974. Its totient is φ = 397423972.

The previous prime is 397423927. The next prime is 397423979. The reversal of 397423973 is 379324793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370870564 + 26553409 = 19258^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 397423973 - 2¹² = 397419877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397423979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198711986 + 198711987.

It is an arithmetic number, because the mean of its divisors is an integer number (198711987).

Almost surely, 2^397423973 is an apocalyptic number.

It is an amenable number.

397423973 is a deficient number, since it is larger than the sum of its proper divisors (1).

397423973 is an equidigital number, since it uses as much as digits as its factorization.

397423973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 47.

The square root of 397423973 is about 19935.4953036036. The cubic root of 397423973 is about 735.2211980204.

The spelling of 397423973 in words is "three hundred ninety-seven million, four hundred twenty-three thousand, nine hundred seventy-three".