646941353 has 2 divisors, whose sum is σ = 646941354. Its totient is φ = 646941352.

The previous prime is 646941319. The next prime is 646941377. The reversal of 646941353 is 353149646.

646941353 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., 430645504 + 216295849 = 20752^2 + 14707^2 .

It is a cyclic number.

It is not a de Polignac number, because 646941353 - 2⁶ = 646941289 is a prime.

It is a super-2 number, since 2×646941353² = 837066228442941218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646941353.

It is not a weakly prime, because it can be changed into another prime (646941653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323470676 + 323470677.

It is an arithmetic number, because the mean of its divisors is an integer number (323470677).

Almost surely, 2^646941353 is an apocalyptic number.

It is an amenable number.

646941353 is a deficient number, since it is larger than the sum of its proper divisors (1).

646941353 is an equidigital number, since it uses as much as digits as its factorization.

646941353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 41.

The square root of 646941353 is about 25435.0418320867. The cubic root of 646941353 is about 864.8782405159.

The spelling of 646941353 in words is "six hundred forty-six million, nine hundred forty-one thousand, three hundred fifty-three".