91840745 has 8 divisors (see below), whose sum is σ = 111537216. Its totient is φ = 72587056.

The previous prime is 91840741. The next prime is 91840747. The reversal of 91840745 is 54704819.

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 91840745 - 2² = 91840741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91840699 and 91840708.

It is not an unprimeable number, because it can be changed into a prime (91840741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110237 + ... + 111066.

It is an arithmetic number, because the mean of its divisors is an integer number (13942152).

Almost surely, 2^91840745 is an apocalyptic number.

It is an amenable number.

91840745 is a deficient number, since it is larger than the sum of its proper divisors (19696471).

91840745 is a wasteful number, since it uses less digits than its factorization.

91840745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221391.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 91840745 is about 9583.3577101139. The cubic root of 91840745 is about 451.1751097700.

The spelling of 91840745 in words is "ninety-one million, eight hundred forty thousand, seven hundred forty-five".