646473593 has 2 divisors, whose sum is σ = 646473594. Its totient is φ = 646473592.

The previous prime is 646473557. The next prime is 646473599. The reversal of 646473593 is 395374646.

646473593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 545129104 + 101344489 = 23348^2 + 10067^2 .

It is a cyclic number.

It is not a de Polignac number, because 646473593 - 2²⁰ = 645425017 is a prime.

It is not a weakly prime, because it can be changed into another prime (646473599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323236796 + 323236797.

It is an arithmetic number, because the mean of its divisors is an integer number (323236797).

Almost surely, 2^646473593 is an apocalyptic number.

It is an amenable number.

646473593 is a deficient number, since it is larger than the sum of its proper divisors (1).

646473593 is an equidigital number, since it uses as much as digits as its factorization.

646473593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 47.

The square root of 646473593 is about 25425.8449810424. The cubic root of 646473593 is about 864.6697450650.

The spelling of 646473593 in words is "six hundred forty-six million, four hundred seventy-three thousand, five hundred ninety-three".