399607223 has 2 divisors, whose sum is σ = 399607224. Its totient is φ = 399607222.

The previous prime is 399607199. The next prime is 399607231. The reversal of 399607223 is 322706993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399607223 - 2²⁰ = 398558647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399607823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199803611 + 199803612.

It is an arithmetic number, because the mean of its divisors is an integer number (199803612).

Almost surely, 2^399607223 is an apocalyptic number.

399607223 is a deficient number, since it is larger than the sum of its proper divisors (1).

399607223 is an equidigital number, since it uses as much as digits as its factorization.

399607223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 399607223 is about 19990.1781632881. The cubic root of 399607223 is about 736.5650536076.

The spelling of 399607223 in words is "three hundred ninety-nine million, six hundred seven thousand, two hundred twenty-three".