394512901 has 2 divisors, whose sum is σ = 394512902. Its totient is φ = 394512900.

The previous prime is 394512823. The next prime is 394512929. The reversal of 394512901 is 109215493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385179876 + 9333025 = 19626^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 394512901 - 2¹⁵ = 394480133 is a prime.

It is equal to p_21059089 and since 394512901 and 21059089 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394512301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197256450 + 197256451.

It is an arithmetic number, because the mean of its divisors is an integer number (197256451).

Almost surely, 2^394512901 is an apocalyptic number.

It is an amenable number.

394512901 is a deficient number, since it is larger than the sum of its proper divisors (1).

394512901 is an equidigital number, since it uses as much as digits as its factorization.

394512901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 394512901 is about 19862.3488288772. The cubic root of 394512901 is about 733.4216681240.

The spelling of 394512901 in words is "three hundred ninety-four million, five hundred twelve thousand, nine hundred one".