399934 has 4 divisors (see below), whose sum is σ = 599904. Its totient is φ = 199966.

The previous prime is 399913. The next prime is 399937. The reversal of 399934 is 439993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 439993 = 61 ⋅7213.

It is a junction number, because it is equal to n+sod(n) for n = 399893 and 399902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399937) by changing a digit.

399934 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99982 + ... + 99985.

It is an arithmetic number, because the mean of its divisors is an integer number (149976).

2³⁹⁹⁹³⁴ is an apocalyptic number.

399934 is a deficient number, since it is larger than the sum of its proper divisors (199970).

399934 is a wasteful number, since it uses less digits than its factorization.

399934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199969.

The product of its digits is 26244, while the sum is 37.

The square root of 399934 is about 632.4033522998. The cubic root of 399934 is about 73.6765773153.

The spelling of 399934 in words is "three hundred ninety-nine thousand, nine hundred thirty-four".