91861745 has 8 divisors (see below), whose sum is σ = 110308416. Its totient is φ = 73439856.

The previous prime is 91861709. The next prime is 91861769. The reversal of 91861745 is 54716819.

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 91861745 - 2¹⁰ = 91860721 is a prime.

It is a Duffinian 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, 3284 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (13788552).

Almost surely, 2^91861745 is an apocalyptic number.

It is an amenable number.

91861745 is a deficient number, since it is larger than the sum of its proper divisors (18446671).

91861745 is a wasteful number, since it uses less digits than its factorization.

91861745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12391.

The product of its digits is 60480, while the sum is 41.

The square root of 91861745 is about 9584.4532968761. The cubic root of 91861745 is about 451.2094952172.

The spelling of 91861745 in words is "ninety-one million, eight hundred sixty-one thousand, seven hundred forty-five".