399683 has 4 divisors (see below), whose sum is σ = 412608. Its totient is φ = 386760.

The previous prime is 399677. The next prime is 399689. The reversal of 399683 is 386993.

399683 = T₃₆₂ + T₃₆₃ + ... + T₃₆₇.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (399677) and next prime (399689).

It is a cyclic number.

It is not a de Polignac number, because 399683 - 2⁴ = 399667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (103152).

2³⁹⁹⁶⁸³ is an apocalyptic number.

399683 is a deficient number, since it is larger than the sum of its proper divisors (12925).

399683 is a wasteful number, since it uses less digits than its factorization.

399683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12924.

The product of its digits is 34992, while the sum is 38.

The square root of 399683 is about 632.2048718572. The cubic root of 399683 is about 73.6611608624.

The spelling of 399683 in words is "three hundred ninety-nine thousand, six hundred eighty-three".