399353 has 2 divisors, whose sum is σ = 399354. Its totient is φ = 399352.

The previous prime is 399283. The next prime is 399379. The reversal of 399353 is 353993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322624 + 76729 = 568^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 399353 - 2⁸ = 399097 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (399853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199676 + 199677.

It is an arithmetic number, because the mean of its divisors is an integer number (199677).

2³⁹⁹³⁵³ is an apocalyptic number.

It is an amenable number.

399353 is a deficient number, since it is larger than the sum of its proper divisors (1).

399353 is an equidigital number, since it uses as much as digits as its factorization.

399353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10935, while the sum is 32.

The square root of 399353 is about 631.9438266175. The cubic root of 399353 is about 73.6408823949.

It can be divided in two parts, 39935 and 3, that multiplied together give a triangular number (119805 = T₄₈₉).

The spelling of 399353 in words is "three hundred ninety-nine thousand, three hundred fifty-three".