394293169 has 2 divisors, whose sum is σ = 394293170. Its totient is φ = 394293168.

The previous prime is 394293143. The next prime is 394293197. The reversal of 394293169 is 961392493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392634225 + 1658944 = 19815^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 394293169 - 2⁷ = 394293041 is a prime.

It is a super-2 number, since 2×394293169² = 310934206240125122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (394203169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197146584 + 197146585.

It is an arithmetic number, because the mean of its divisors is an integer number (197146585).

Almost surely, 2^394293169 is an apocalyptic number.

It is an amenable number.

394293169 is a deficient number, since it is larger than the sum of its proper divisors (1).

394293169 is an equidigital number, since it uses as much as digits as its factorization.

394293169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 46.

The square root of 394293169 is about 19856.8166884826. The cubic root of 394293169 is about 733.2854781214.

The spelling of 394293169 in words is "three hundred ninety-four million, two hundred ninety-three thousand, one hundred sixty-nine".