394429423 has 2 divisors, whose sum is σ = 394429424. Its totient is φ = 394429422.

The previous prime is 394429403. The next prime is 394429433. The reversal of 394429423 is 324924493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394429423 - 2⁵ = 394429391 is a prime.

It is a super-2 number, since 2×394429423² = 311149139456225858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394429403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197214711 + 197214712.

It is an arithmetic number, because the mean of its divisors is an integer number (197214712).

Almost surely, 2^394429423 is an apocalyptic number.

394429423 is a deficient number, since it is larger than the sum of its proper divisors (1).

394429423 is an equidigital number, since it uses as much as digits as its factorization.

394429423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 394429423 is about 19860.2473046032. The cubic root of 394429423 is about 733.3699343761.

The spelling of 394429423 in words is "three hundred ninety-four million, four hundred twenty-nine thousand, four hundred twenty-three".