393690039 has 8 divisors (see below), whose sum is σ = 525145200. Its totient is φ = 262347456.

The previous prime is 393690019. The next prime is 393690041. The reversal of 393690039 is 930096393.

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

It is not a de Polignac number, because 393690039 - 2⁵ = 393690007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393690019) 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, 19614 + ... + 34235.

It is an arithmetic number, because the mean of its divisors is an integer number (65643150).

Almost surely, 2^393690039 is an apocalyptic number.

393690039 is a deficient number, since it is larger than the sum of its proper divisors (131455161).

393690039 is a wasteful number, since it uses less digits than its factorization.

393690039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56289.

The product of its (nonzero) digits is 118098, while the sum is 42.

The square root of 393690039 is about 19841.6239002759. The cubic root of 393690039 is about 732.9113976139.

The spelling of 393690039 in words is "three hundred ninety-three million, six hundred ninety thousand, thirty-nine".