91020317 has 8 divisors (see below), whose sum is σ = 96368160. Its totient is φ = 85728240.

The previous prime is 91020311. The next prime is 91020343. The reversal of 91020317 is 71302019.

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 91020317 - 2¹⁴ = 91003933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91020292 and 91020301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91020311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10559 + ... + 17132.

It is an arithmetic number, because the mean of its divisors is an integer number (12046020).

Almost surely, 2^91020317 is an apocalyptic number.

It is an amenable number.

91020317 is a deficient number, since it is larger than the sum of its proper divisors (5347843).

91020317 is a wasteful number, since it uses less digits than its factorization.

91020317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27883.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 91020317 is about 9540.4568548891. The cubic root of 91020317 is about 449.8276162771.

The spelling of 91020317 in words is "ninety-one million, twenty thousand, three hundred seventeen".