91085506 has 8 divisors (see below), whose sum is σ = 143819280. Its totient is φ = 43145748.

The previous prime is 91085503. The next prime is 91085509. The reversal of 91085506 is 60558019.

It is an interprime number because it is at equal distance from previous prime (91085503) and next prime (91085509).

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

It is not an unprimeable number, because it can be changed into a prime (91085503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198456 + ... + 1198531.

It is an arithmetic number, because the mean of its divisors is an integer number (17977410).

Almost surely, 2^91085506 is an apocalyptic number.

91085506 is a deficient number, since it is larger than the sum of its proper divisors (52733774).

91085506 is a wasteful number, since it uses less digits than its factorization.

91085506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397008.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 91085506 is about 9543.8726940378. The cubic root of 91085506 is about 449.9349799062.

The spelling of 91085506 in words is "ninety-one million, eighty-five thousand, five hundred six".