91990095 has 8 divisors (see below), whose sum is σ = 147184176. Its totient is φ = 49061376.

The previous prime is 91990091. The next prime is 91990097. The reversal of 91990095 is 59009919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91990095 - 2² = 91990091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91990091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3066322 + ... + 3066351.

It is an arithmetic number, because the mean of its divisors is an integer number (18398022).

Almost surely, 2^91990095 is an apocalyptic number.

91990095 is a deficient number, since it is larger than the sum of its proper divisors (55194081).

91990095 is a wasteful number, since it uses less digits than its factorization.

91990095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132681.

The product of its (nonzero) digits is 32805, while the sum is 42.

The square root of 91990095 is about 9591.1466989094. The cubic root of 91990095 is about 451.4195419839.

The spelling of 91990095 in words is "ninety-one million, nine hundred ninety thousand, ninety-five".