399703 has 8 divisors (see below), whose sum is σ = 426800. Its totient is φ = 373248.

The previous prime is 399691. The next prime is 399719. The reversal of 399703 is 307993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 9-Lehmer number, since φ(399703) divides (399703-1)⁹.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399703 is a prime.

It is a Duffinian number.

399703 is a modest number, since divided by 703 gives 399 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (53350).

2³⁹⁹⁷⁰³ is an apocalyptic number.

399703 is a deficient number, since it is larger than the sum of its proper divisors (27097).

399703 is a wasteful number, since it uses less digits than its factorization.

399703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 399703 is about 632.2206893166. The cubic root of 399703 is about 73.6623895016.

The spelling of 399703 in words is "three hundred ninety-nine thousand, seven hundred three".