397040617 has 2 divisors, whose sum is σ = 397040618. Its totient is φ = 397040616.

The previous prime is 397040603. The next prime is 397040639. The reversal of 397040617 is 716040793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227285776 + 169754841 = 15076^2 + 13029^2 .

It is a cyclic number.

It is not a de Polignac number, because 397040617 - 2⁷ = 397040489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397040647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198520308 + 198520309.

It is an arithmetic number, because the mean of its divisors is an integer number (198520309).

Almost surely, 2^397040617 is an apocalyptic number.

It is an amenable number.

397040617 is a deficient number, since it is larger than the sum of its proper divisors (1).

397040617 is an equidigital number, since it uses as much as digits as its factorization.

397040617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 397040617 is about 19925.8780735003. The cubic root of 397040617 is about 734.9847233316.

The spelling of 397040617 in words is "three hundred ninety-seven million, forty thousand, six hundred seventeen".