91116869 has 8 divisors (see below), whose sum is σ = 98357760. Its totient is φ = 84149296.

The previous prime is 91116841. The next prime is 91116877. The reversal of 91116869 is 96861119.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 91116869 - 2¹⁶ = 91051333 is a prime.

It is a super-2 number, since 2×91116869² = 16604567632726322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91116899) 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, 67637 + ... + 68970.

It is an arithmetic number, because the mean of its divisors is an integer number (12294720).

Almost surely, 2^91116869 is an apocalyptic number.

It is an amenable number.

91116869 is a deficient number, since it is larger than the sum of its proper divisors (7240891).

91116869 is a wasteful number, since it uses less digits than its factorization.

91116869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136659.

The product of its digits is 23328, while the sum is 41.

The square root of 91116869 is about 9545.5156487222. The cubic root of 91116869 is about 449.9866152397.

The spelling of 91116869 in words is "ninety-one million, one hundred sixteen thousand, eight hundred sixty-nine".