390679 has 4 divisors (see below), whose sum is σ = 394576. Its totient is φ = 386784.

The previous prime is 390673. The next prime is 390703. The reversal of 390679 is 976093.

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

It is a cyclic number.

It is not a de Polignac number, because 390679 - 2³ = 390671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390671) 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, 1794 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (98644).

2³⁹⁰⁶⁷⁹ is an apocalyptic number.

390679 is a deficient number, since it is larger than the sum of its proper divisors (3897).

390679 is a wasteful number, since it uses less digits than its factorization.

390679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 390679 is about 625.0431985071. The cubic root of 390679 is about 73.1038117685.

The spelling of 390679 in words is "three hundred ninety thousand, six hundred seventy-nine".