91120481 has 4 divisors (see below), whose sum is σ = 91785732. Its totient is φ = 90455232.

The previous prime is 91120453. The next prime is 91120489. The reversal of 91120481 is 18402119.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52432081 + 38688400 = 7241^2 + 6220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91120481 is a prime.

It is a super-2 number, since 2×91120481² = 16605884115342722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91120481.

It is not an unprimeable number, because it can be changed into a prime (91120489) 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, 332420 + ... + 332693.

It is an arithmetic number, because the mean of its divisors is an integer number (22946433).

Almost surely, 2^91120481 is an apocalyptic number.

It is an amenable number.

91120481 is a deficient number, since it is larger than the sum of its proper divisors (665251).

91120481 is a wasteful number, since it uses less digits than its factorization.

91120481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665250.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 91120481 is about 9545.7048456361. The cubic root of 91120481 is about 449.9925611939.

The spelling of 91120481 in words is "ninety-one million, one hundred twenty thousand, four hundred eighty-one".