394051897 has 2 divisors, whose sum is σ = 394051898. Its totient is φ = 394051896.

The previous prime is 394051877. The next prime is 394051907. The reversal of 394051897 is 798150493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358875136 + 35176761 = 18944^2 + 5931^2 .

It is a cyclic number.

It is not a de Polignac number, because 394051897 - 2⁷ = 394051769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (394051837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197025948 + 197025949.

It is an arithmetic number, because the mean of its divisors is an integer number (197025949).

Almost surely, 2^394051897 is an apocalyptic number.

It is an amenable number.

394051897 is a deficient number, since it is larger than the sum of its proper divisors (1).

394051897 is an equidigital number, since it uses as much as digits as its factorization.

394051897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 394051897 is about 19850.7404647786. The cubic root of 394051897 is about 733.1358793231.

The spelling of 394051897 in words is "three hundred ninety-four million, fifty-one thousand, eight hundred ninety-seven".