399374 has 4 divisors (see below), whose sum is σ = 599064. Its totient is φ = 199686.

The previous prime is 399353. The next prime is 399379. The reversal of 399374 is 473993.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399379) by changing a digit.

399374 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 99842 + ... + 99845.

It is an arithmetic number, because the mean of its divisors is an integer number (149766).

2³⁹⁹³⁷⁴ is an apocalyptic number.

399374 is a deficient number, since it is larger than the sum of its proper divisors (199690).

399374 is a wasteful number, since it uses less digits than its factorization.

399374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199689.

The product of its digits is 20412, while the sum is 35.

The square root of 399374 is about 631.9604418000. The cubic root of 399374 is about 73.6421731756.

The spelling of 399374 in words is "three hundred ninety-nine thousand, three hundred seventy-four".