63297891 has 12 divisors (see below), whose sum is σ = 93660840. Its totient is φ = 41169120.

The previous prime is 63297889. The next prime is 63297893. The reversal of 63297891 is 19879236.

63297891 is a `hidden beast` number, since 632 + 9 + 7 + 8 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (63297889) and next prime (63297893).

It is not a de Polignac number, because 63297891 - 2¹ = 63297889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63297893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85401 + ... + 86138.

It is an arithmetic number, because the mean of its divisors is an integer number (7805070).

Almost surely, 2^63297891 is an apocalyptic number.

63297891 is a deficient number, since it is larger than the sum of its proper divisors (30362949).

63297891 is a wasteful number, since it uses less digits than its factorization.

63297891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171586 (or 171583 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 63297891 is about 7955.9971719452. The cubic root of 63297891 is about 398.5318911499.

Adding to 63297891 its sum of digits (45), we get a square (63297936 = 7956²).

The spelling of 63297891 in words is "sixty-three million, two hundred ninety-seven thousand, eight hundred ninety-one".