646289113 has 2 divisors, whose sum is σ = 646289114. Its totient is φ = 646289112.

The previous prime is 646289071. The next prime is 646289129. The reversal of 646289113 is 311982646.

646289113 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., 570111129 + 76177984 = 23877^2 + 8728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646289113 is a prime.

It is not a weakly prime, because it can be changed into another prime (646289173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323144556 + 323144557.

It is an arithmetic number, because the mean of its divisors is an integer number (323144557).

Almost surely, 2^646289113 is an apocalyptic number.

It is an amenable number.

646289113 is a deficient number, since it is larger than the sum of its proper divisors (1).

646289113 is an equidigital number, since it uses as much as digits as its factorization.

646289113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 646289113 is about 25422.2169174917. The cubic root of 646289113 is about 864.5874888306.

The spelling of 646289113 in words is "six hundred forty-six million, two hundred eighty-nine thousand, one hundred thirteen".