63105091 has 12 divisors (see below), whose sum is σ = 75394128. Its totient is φ = 52626672.

The previous prime is 63105079. The next prime is 63105143. The reversal of 63105091 is 19050136.

It is not a de Polignac number, because 63105091 - 2⁵ = 63105059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63105001) 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, 15591 + ... + 19216.

It is an arithmetic number, because the mean of its divisors is an integer number (6282844).

Almost surely, 2^63105091 is an apocalyptic number.

63105091 is a deficient number, since it is larger than the sum of its proper divisors (12289037).

63105091 is a wasteful number, since it uses less digits than its factorization.

63105091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34858 (or 34851 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 63105091 is about 7943.8712854628. The cubic root of 63105091 is about 398.1268481982.

The spelling of 63105091 in words is "sixty-three million, one hundred five thousand, ninety-one".