91690585 has 16 divisors (see below), whose sum is σ = 126205056. Its totient is φ = 62644608.

The previous prime is 91690579. The next prime is 91690589. The reversal of 91690585 is 58509619.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91690585 - 2⁵ = 91690553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91690589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5277 + ... + 14533.

It is an arithmetic number, because the mean of its divisors is an integer number (7887816).

Almost surely, 2^91690585 is an apocalyptic number.

It is an amenable number.

91690585 is a deficient number, since it is larger than the sum of its proper divisors (34514471).

91690585 is a wasteful number, since it uses less digits than its factorization.

91690585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9552.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 91690585 is about 9575.5200903136. The cubic root of 91690585 is about 450.9290845770.

The spelling of 91690585 in words is "ninety-one million, six hundred ninety thousand, five hundred eighty-five".