397049017 has 2 divisors, whose sum is σ = 397049018. Its totient is φ = 397049016.

The previous prime is 397048987. The next prime is 397049041. The reversal of 397049017 is 710940793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385886736 + 11162281 = 19644^2 + 3341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397049017 is a prime.

It is not a weakly prime, because it can be changed into another prime (397049717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198524508 + 198524509.

It is an arithmetic number, because the mean of its divisors is an integer number (198524509).

Almost surely, 2^397049017 is an apocalyptic number.

It is an amenable number.

397049017 is a deficient number, since it is larger than the sum of its proper divisors (1).

397049017 is an equidigital number, since it uses as much as digits as its factorization.

397049017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 397049017 is about 19926.0888535608. The cubic root of 397049017 is about 734.9899065361.

The spelling of 397049017 in words is "three hundred ninety-seven million, forty-nine thousand, seventeen".