394223623 has 2 divisors, whose sum is σ = 394223624. Its totient is φ = 394223622.

The previous prime is 394223597. The next prime is 394223629. The reversal of 394223623 is 326322493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394223623 - 2⁹ = 394223111 is a prime.

It is a super-2 number, since 2×394223623² = 310824529862492258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394223629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197111811 + 197111812.

It is an arithmetic number, because the mean of its divisors is an integer number (197111812).

Almost surely, 2^394223623 is an apocalyptic number.

394223623 is a deficient number, since it is larger than the sum of its proper divisors (1).

394223623 is an equidigital number, since it uses as much as digits as its factorization.

394223623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 34.

The square root of 394223623 is about 19855.0654242186. The cubic root of 394223623 is about 733.2423629350.

The spelling of 394223623 in words is "three hundred ninety-four million, two hundred twenty-three thousand, six hundred twenty-three".