91608775 has 6 divisors (see below), whose sum is σ = 113594912. Its totient is φ = 73287000.

The previous prime is 91608773. The next prime is 91608779. The reversal of 91608775 is 57780619.

It is not a de Polignac number, because 91608775 - 2¹ = 91608773 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 (91608773) 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 5 ways as a sum of consecutive naturals, for example, 1832151 + ... + 1832200.

Almost surely, 2^91608775 is an apocalyptic number.

91608775 is a deficient number, since it is larger than the sum of its proper divisors (21986137).

91608775 is a wasteful number, since it uses less digits than its factorization.

91608775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664361 (or 3664356 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 91608775 is about 9571.2473063859. The cubic root of 91608775 is about 450.7949323607.

The spelling of 91608775 in words is "ninety-one million, six hundred eight thousand, seven hundred seventy-five".