390327556673 has 2 divisors, whose sum is σ = 390327556674. Its totient is φ = 390327556672.

The previous prime is 390327556631. The next prime is 390327556679. The reversal of 390327556673 is 376655723093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333555916849 + 56771639824 = 577543^2 + 238268^2 .

It is a cyclic number.

It is not a de Polignac number, because 390327556673 - 2¹⁰ = 390327555649 is a prime.

It is not a weakly prime, because it can be changed into another prime (390327556679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195163778336 + 195163778337.

It is an arithmetic number, because the mean of its divisors is an integer number (195163778337).

Almost surely, 2^390327556673 is an apocalyptic number.

It is an amenable number.

390327556673 is a deficient number, since it is larger than the sum of its proper divisors (1).

390327556673 is an equidigital number, since it uses as much as digits as its factorization.

390327556673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21432600, while the sum is 56.

The spelling of 390327556673 in words is "three hundred ninety billion, three hundred twenty-seven million, five hundred fifty-six thousand, six hundred seventy-three".