394524401 has 2 divisors, whose sum is σ = 394524402. Its totient is φ = 394524400.

The previous prime is 394524397. The next prime is 394524409. The reversal of 394524401 is 104425493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357021025 + 37503376 = 18895^2 + 6124^2 .

It is a cyclic number.

It is not a de Polignac number, because 394524401 - 2² = 394524397 is a prime.

It is equal to p_21059690 and since 394524401 and 21059690 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (394524409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197262200 + 197262201.

It is an arithmetic number, because the mean of its divisors is an integer number (197262201).

Almost surely, 2^394524401 is an apocalyptic number.

It is an amenable number.

394524401 is a deficient number, since it is larger than the sum of its proper divisors (1).

394524401 is an equidigital number, since it uses as much as digits as its factorization.

394524401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 394524401 is about 19862.6383192163. The cubic root of 394524401 is about 733.4287944370.

Adding to 394524401 its reverse (104425493), we get a palindrome (498949894).

The spelling of 394524401 in words is "three hundred ninety-four million, five hundred twenty-four thousand, four hundred one".