394201057 has 2 divisors, whose sum is σ = 394201058. Its totient is φ = 394201056.

The previous prime is 394201051. The next prime is 394201069. The reversal of 394201057 is 750102493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358572096 + 35628961 = 18936^2 + 5969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394201057 is a prime.

It is not a weakly prime, because it can be changed into another prime (394201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197100528 + 197100529.

It is an arithmetic number, because the mean of its divisors is an integer number (197100529).

Almost surely, 2^394201057 is an apocalyptic number.

It is an amenable number.

394201057 is a deficient number, since it is larger than the sum of its proper divisors (1).

394201057 is an equidigital number, since it uses as much as digits as its factorization.

394201057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 394201057 is about 19854.4971480015. The cubic root of 394201057 is about 733.2283720071.

The spelling of 394201057 in words is "three hundred ninety-four million, two hundred one thousand, fifty-seven".