390693739 has 4 divisors (see below), whose sum is σ = 390761280. Its totient is φ = 390626200.

The previous prime is 390693733. The next prime is 390693761. The reversal of 390693739 is 937396093.

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 390693739 - 2³ = 390693731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390693692 and 390693701.

It is not an unprimeable number, because it can be changed into a prime (390693731) 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, 24187 + ... + 36964.

It is an arithmetic number, because the mean of its divisors is an integer number (97690320).

Almost surely, 2^390693739 is an apocalyptic number.

390693739 is a deficient number, since it is larger than the sum of its proper divisors (67541).

390693739 is an equidigital number, since it uses as much as digits as its factorization.

390693739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67540.

The product of its (nonzero) digits is 826686, while the sum is 49.

The square root of 390693739 is about 19765.9742739891. The cubic root of 390693739 is about 731.0473107701.

The spelling of 390693739 in words is "three hundred ninety million, six hundred ninety-three thousand, seven hundred thirty-nine".