91806086 has 8 divisors (see below), whose sum is σ = 145809720. Its totient is φ = 43202848.

The previous prime is 91806067. The next prime is 91806101. The reversal of 91806086 is 68060819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350056 + ... + 1350123.

It is an arithmetic number, because the mean of its divisors is an integer number (18226215).

Almost surely, 2^91806086 is an apocalyptic number.

91806086 is a deficient number, since it is larger than the sum of its proper divisors (54003634).

91806086 is a wasteful number, since it uses less digits than its factorization.

91806086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700198.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 91806086 is about 9581.5492484253. The cubic root of 91806086 is about 451.1183475794.

The spelling of 91806086 in words is "ninety-one million, eight hundred six thousand, eighty-six".