91995063 has 4 divisors (see below), whose sum is σ = 122660088. Its totient is φ = 61330040.

The previous prime is 91995053. The next prime is 91995067. The reversal of 91995063 is 36059919.

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 91995063 - 2⁸ = 91994807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91995067) 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, 15332508 + ... + 15332513.

It is an arithmetic number, because the mean of its divisors is an integer number (30665022).

Almost surely, 2^91995063 is an apocalyptic number.

91995063 is a deficient number, since it is larger than the sum of its proper divisors (30665025).

91995063 is a wasteful number, since it uses less digits than its factorization.

91995063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30665024.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 91995063 is about 9591.4056842571. The cubic root of 91995063 is about 451.4276682643.

The spelling of 91995063 in words is "ninety-one million, nine hundred ninety-five thousand, sixty-three".