399793 has 2 divisors, whose sum is σ = 399794. Its totient is φ = 399792.

The previous prime is 399787. The next prime is 399851. The reversal of 399793 is 397993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 11664 = 623^2 + 108^2 .

It is a cyclic number.

It is not a de Polignac number, because 399793 - 2⁵ = 399761 is a prime.

It is not a weakly prime, because it can be changed into another prime (399493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199896 + 199897.

It is an arithmetic number, because the mean of its divisors is an integer number (199897).

2³⁹⁹⁷⁹³ is an apocalyptic number.

It is an amenable number.

399793 is a deficient number, since it is larger than the sum of its proper divisors (1).

399793 is an equidigital number, since it uses as much as digits as its factorization.

399793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45927, while the sum is 40.

The square root of 399793 is about 632.2918629873. The cubic root of 399793 is about 73.6679178710.

The spelling of 399793 in words is "three hundred ninety-nine thousand, seven hundred ninety-three".