91613985 has 8 divisors (see below), whose sum is σ = 146582400. Its totient is φ = 48860784.

The previous prime is 91613971. The next prime is 91613999. The reversal of 91613985 is 58931619.

It is an interprime number because it is at equal distance from previous prime (91613971) and next prime (91613999).

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

It is not a de Polignac number, because 91613985 - 2¹¹ = 91611937 is a prime.

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, 3053785 + ... + 3053814.

It is an arithmetic number, because the mean of its divisors is an integer number (18322800).

Almost surely, 2^91613985 is an apocalyptic number.

It is an amenable number.

91613985 is a deficient number, since it is larger than the sum of its proper divisors (54968415).

91613985 is a wasteful number, since it uses less digits than its factorization.

91613985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6107607.

The product of its digits is 58320, while the sum is 42.

The square root of 91613985 is about 9571.5194718498. The cubic root of 91613985 is about 450.8034781107.

The spelling of 91613985 in words is "ninety-one million, six hundred thirteen thousand, nine hundred eighty-five".