390321663 has 8 divisors (see below), whose sum is σ = 520689408. Its totient is φ = 260084184.

The previous prime is 390321653. The next prime is 390321677. The reversal of 390321663 is 366123093.

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

It is not a de Polignac number, because 390321663 - 2¹³ = 390313471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390321653) 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, 25345 + ... + 37722.

It is an arithmetic number, because the mean of its divisors is an integer number (65086176).

Almost surely, 2^390321663 is an apocalyptic number.

390321663 is a deficient number, since it is larger than the sum of its proper divisors (130367745).

390321663 is a wasteful number, since it uses less digits than its factorization.

390321663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65133.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 390321663 is about 19756.5599991496. The cubic root of 390321663 is about 730.8151668293.

The spelling of 390321663 in words is "three hundred ninety million, three hundred twenty-one thousand, six hundred sixty-three".