633968893 has 2 divisors, whose sum is σ = 633968894. Its totient is φ = 633968892.

The previous prime is 633968873. The next prime is 633968897. The reversal of 633968893 is 398869336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381889764 + 252079129 = 19542^2 + 15877^2 .

It is a cyclic number.

It is not a de Polignac number, because 633968893 - 2²¹ = 631871741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633968897) 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 as a sum of consecutive naturals, namely, 316984446 + 316984447.

It is an arithmetic number, because the mean of its divisors is an integer number (316984447).

Almost surely, 2^633968893 is an apocalyptic number.

It is an amenable number.

633968893 is a deficient number, since it is larger than the sum of its proper divisors (1).

633968893 is an equidigital number, since it uses as much as digits as its factorization.

633968893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 55.

The square root of 633968893 is about 25178.7389080549. The cubic root of 633968893 is about 859.0583225182.

The spelling of 633968893 in words is "six hundred thirty-three million, nine hundred sixty-eight thousand, eight hundred ninety-three".