390649683 has 4 divisors (see below), whose sum is σ = 520866248. Its totient is φ = 260433120.

The previous prime is 390649669. The next prime is 390649717. The reversal of 390649683 is 386946093.

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

It is not a de Polignac number, because 390649683 - 2⁴ = 390649667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390649283) 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, 65108278 + ... + 65108283.

It is an arithmetic number, because the mean of its divisors is an integer number (130216562).

Almost surely, 2^390649683 is an apocalyptic number.

390649683 is a deficient number, since it is larger than the sum of its proper divisors (130216565).

390649683 is a wasteful number, since it uses less digits than its factorization.

390649683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130216564.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 390649683 is about 19764.8598021843. The cubic root of 390649683 is about 731.0198312486.

The spelling of 390649683 in words is "three hundred ninety million, six hundred forty-nine thousand, six hundred eighty-three".