397281497 has 2 divisors, whose sum is σ = 397281498. Its totient is φ = 397281496.

The previous prime is 397281427. The next prime is 397281539. The reversal of 397281497 is 794182793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377175241 + 20106256 = 19421^2 + 4484^2 .

It is a cyclic number.

It is not a de Polignac number, because 397281497 - 2¹⁰ = 397280473 is a prime.

It is a super-2 number, since 2×397281497² = 315665175717122018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397281407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198640748 + 198640749.

It is an arithmetic number, because the mean of its divisors is an integer number (198640749).

Almost surely, 2^397281497 is an apocalyptic number.

It is an amenable number.

397281497 is a deficient number, since it is larger than the sum of its proper divisors (1).

397281497 is an equidigital number, since it uses as much as digits as its factorization.

397281497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 397281497 is about 19931.9215581439. The cubic root of 397281497 is about 735.1333288909.

The spelling of 397281497 in words is "three hundred ninety-seven million, two hundred eighty-one thousand, four hundred ninety-seven".