397976497 has 2 divisors, whose sum is σ = 397976498. Its totient is φ = 397976496.

The previous prime is 397976479. The next prime is 397976519. The reversal of 397976497 is 794679793.

Together with previous prime (397976479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297355536 + 100620961 = 17244^2 + 10031^2 .

It is a cyclic number.

It is not a de Polignac number, because 397976497 - 2¹¹ = 397974449 is a prime.

It is not a weakly prime, because it can be changed into another prime (397986497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198988248 + 198988249.

It is an arithmetic number, because the mean of its divisors is an integer number (198988249).

Almost surely, 2^397976497 is an apocalyptic number.

It is an amenable number.

397976497 is a deficient number, since it is larger than the sum of its proper divisors (1).

397976497 is an equidigital number, since it uses as much as digits as its factorization.

397976497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18003384, while the sum is 61.

The square root of 397976497 is about 19949.3482850944. The cubic root of 397976497 is about 735.5617572852.

The spelling of 397976497 in words is "three hundred ninety-seven million, nine hundred seventy-six thousand, four hundred ninety-seven".