91109045 has 8 divisors (see below), whose sum is σ = 111873696. Its totient is φ = 71192016.

The previous prime is 91109027. The next prime is 91109063. The reversal of 91109045 is 54090119.

It is an interprime number because it is at equal distance from previous prime (91109027) and next prime (91109063).

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 91109045 - 2⁸ = 91108789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91108999 and 91109017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211667 + ... + 212096.

It is an arithmetic number, because the mean of its divisors is an integer number (13984212).

Almost surely, 2^91109045 is an apocalyptic number.

It is an amenable number.

91109045 is a deficient number, since it is larger than the sum of its proper divisors (20764651).

91109045 is a wasteful number, since it uses less digits than its factorization.

91109045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423811.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 91109045 is about 9545.1058139761. The cubic root of 91109045 is about 449.9737350926.

The spelling of 91109045 in words is "ninety-one million, one hundred nine thousand, forty-five".