399479183 has 2 divisors, whose sum is σ = 399479184. Its totient is φ = 399479182.

The previous prime is 399479177. The next prime is 399479219. The reversal of 399479183 is 381974993.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399479183 - 2²⁰ = 398430607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399479783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199739591 + 199739592.

It is an arithmetic number, because the mean of its divisors is an integer number (199739592).

Almost surely, 2^399479183 is an apocalyptic number.

399479183 is a deficient number, since it is larger than the sum of its proper divisors (1).

399479183 is an equidigital number, since it uses as much as digits as its factorization.

399479183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 399479183 is about 19986.9753339519. The cubic root of 399479183 is about 736.4863764645.

The spelling of 399479183 in words is "three hundred ninety-nine million, four hundred seventy-nine thousand, one hundred eighty-three".