91123601 has 16 divisors (see below), whose sum is σ = 100454400. Its totient is φ = 82328400.

The previous prime is 91123583. The next prime is 91123619. The reversal of 91123601 is 10632119.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91123583) and next prime (91123619).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91123601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91123651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40730 + ... + 42908.

It is an arithmetic number, because the mean of its divisors is an integer number (6278400).

Almost surely, 2^91123601 is an apocalyptic number.

It is an amenable number.

91123601 is a deficient number, since it is larger than the sum of its proper divisors (9330799).

91123601 is a wasteful number, since it uses less digits than its factorization.

91123601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 91123601 is about 9545.8682685233. The cubic root of 91123601 is about 449.9976971076.

The spelling of 91123601 in words is "ninety-one million, one hundred twenty-three thousand, six hundred one".