394425901 has 2 divisors, whose sum is σ = 394425902. Its totient is φ = 394425900.

The previous prime is 394425859. The next prime is 394425929. The reversal of 394425901 is 109524493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217562500 + 176863401 = 14750^2 + 13299^2 .

It is a cyclic number.

It is not a de Polignac number, because 394425901 - 2²¹ = 392328749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394425961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197212950 + 197212951.

It is an arithmetic number, because the mean of its divisors is an integer number (197212951).

Almost surely, 2^394425901 is an apocalyptic number.

It is an amenable number.

394425901 is a deficient number, since it is larger than the sum of its proper divisors (1).

394425901 is an equidigital number, since it uses as much as digits as its factorization.

394425901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 394425901 is about 19860.1586348146. The cubic root of 394425901 is about 733.3677515297.

The spelling of 394425901 in words is "three hundred ninety-four million, four hundred twenty-five thousand, nine hundred one".