91117277 has 4 divisors (see below), whose sum is σ = 94056576. Its totient is φ = 88177980.

The previous prime is 91117261. The next prime is 91117289. The reversal of 91117277 is 77271119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77271119 = 19 ⋅4066901.

It is a cyclic number.

It is not a de Polignac number, because 91117277 - 2⁴ = 91117261 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 (91117207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469603 + ... + 1469664.

It is an arithmetic number, because the mean of its divisors is an integer number (23514144).

Almost surely, 2^91117277 is an apocalyptic number.

It is an amenable number.

91117277 is a deficient number, since it is larger than the sum of its proper divisors (2939299).

91117277 is a wasteful number, since it uses less digits than its factorization.

91117277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939298.

The product of its digits is 6174, while the sum is 35.

The square root of 91117277 is about 9545.5370199900. The cubic root of 91117277 is about 449.9872868836.

The spelling of 91117277 in words is "ninety-one million, one hundred seventeen thousand, two hundred seventy-seven".