390747983 has 4 divisors (see below), whose sum is σ = 395694240. Its totient is φ = 385801728.

The previous prime is 390747971. The next prime is 390748019. The reversal of 390747983 is 389747093.

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 390747983 - 2⁶ = 390747919 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 (390767983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473010 + ... + 2473167.

It is an arithmetic number, because the mean of its divisors is an integer number (98923560).

Almost surely, 2^390747983 is an apocalyptic number.

390747983 is a deficient number, since it is larger than the sum of its proper divisors (4946257).

390747983 is an equidigital number, since it uses as much as digits as its factorization.

390747983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946256.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 390747983 is about 19767.3463823549. The cubic root of 390747983 is about 731.0811421247.

The spelling of 390747983 in words is "three hundred ninety million, seven hundred forty-seven thousand, nine hundred eighty-three".