63112891 has 4 divisors (see below), whose sum is σ = 66825432. Its totient is φ = 59400352.

The previous prime is 63112871. The next prime is 63112913. The reversal of 63112891 is 19821136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63112891 - 2⁵ = 63112859 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63112801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856245 + ... + 1856278.

It is an arithmetic number, because the mean of its divisors is an integer number (16706358).

Almost surely, 2^63112891 is an apocalyptic number.

63112891 is a deficient number, since it is larger than the sum of its proper divisors (3712541).

63112891 is a wasteful number, since it uses less digits than its factorization.

63112891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712540.

The product of its digits is 2592, while the sum is 31.

The square root of 63112891 is about 7944.3622148037. The cubic root of 63112891 is about 398.1432507917.

The spelling of 63112891 in words is "sixty-three million, one hundred twelve thousand, eight hundred ninety-one".