399766223 has 2 divisors, whose sum is σ = 399766224. Its totient is φ = 399766222.

The previous prime is 399766217. The next prime is 399766229. The reversal of 399766223 is 322667993.

It is a balanced prime because it is at equal distance from previous prime (399766217) and next prime (399766229).

It is a cyclic number.

It is not a de Polignac number, because 399766223 - 2⁴ = 399766207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399766229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199883111 + 199883112.

It is an arithmetic number, because the mean of its divisors is an integer number (199883112).

Almost surely, 2^399766223 is an apocalyptic number.

399766223 is a deficient number, since it is larger than the sum of its proper divisors (1).

399766223 is an equidigital number, since it uses as much as digits as its factorization.

399766223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 47.

The square root of 399766223 is about 19994.1547208178. The cubic root of 399766223 is about 736.6627314500.

The spelling of 399766223 in words is "three hundred ninety-nine million, seven hundred sixty-six thousand, two hundred twenty-three".