399433 has 2 divisors, whose sum is σ = 399434. Its totient is φ = 399432.

The previous prime is 399409. The next prime is 399439. The reversal of 399433 is 334993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399424 + 9 = 632^2 + 3^2 .

It is an emirp because it is prime and its reverse (334993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399433 - 2⁵ = 399401 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 399395 and 399404.

It is not a weakly prime, because it can be changed into another prime (399439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199716 + 199717.

It is an arithmetic number, because the mean of its divisors is an integer number (199717).

2³⁹⁹⁴³³ is an apocalyptic number.

It is an amenable number.

399433 is a deficient number, since it is larger than the sum of its proper divisors (1).

399433 is an equidigital number, since it uses as much as digits as its factorization.

399433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 31.

The square root of 399433 is about 632.0071202131. The cubic root of 399433 is about 73.6457994125.

The spelling of 399433 in words is "three hundred ninety-nine thousand, four hundred thirty-three".