394429823 has 4 divisors (see below), whose sum is σ = 395187408. Its totient is φ = 393672240.

The previous prime is 394429807. The next prime is 394429831. The reversal of 394429823 is 328924493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 394429823 - 2⁴ = 394429807 is a prime.

It is a super-2 number, since 2×394429823² = 311149770543622658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394429883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378011 + ... + 379052.

It is an arithmetic number, because the mean of its divisors is an integer number (98796852).

Almost surely, 2^394429823 is an apocalyptic number.

394429823 is a deficient number, since it is larger than the sum of its proper divisors (757585).

394429823 is an equidigital number, since it uses as much as digits as its factorization.

394429823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757584.

The product of its digits is 373248, while the sum is 44.

The square root of 394429823 is about 19860.2573749687. The cubic root of 394429823 is about 733.3701822852.

The spelling of 394429823 in words is "three hundred ninety-four million, four hundred twenty-nine thousand, eight hundred twenty-three".