91095691 has 4 divisors (see below), whose sum is σ = 91202112. Its totient is φ = 90989272.

The previous prime is 91095677. The next prime is 91095743. The reversal of 91095691 is 19659019.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91095691 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (91095601) 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, 51916 + ... + 53641.

It is an arithmetic number, because the mean of its divisors is an integer number (22800528).

Almost surely, 2^91095691 is an apocalyptic number.

91095691 is a deficient number, since it is larger than the sum of its proper divisors (106421).

91095691 is a wasteful number, since it uses less digits than its factorization.

91095691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106420.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 91095691 is about 9544.4062675475. The cubic root of 91095691 is about 449.9517495591.

The spelling of 91095691 in words is "ninety-one million, ninety-five thousand, six hundred ninety-one".