91285417 has 4 divisors (see below), whose sum is σ = 94433220. Its totient is φ = 88137616.

The previous prime is 91285391. The next prime is 91285433. The reversal of 91285417 is 71458219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59351616 + 31933801 = 7704^2 + 5651^2 .

It is a cyclic number.

It is not a de Polignac number, because 91285417 - 2¹⁹ = 90761129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91285217) 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, 1573858 + ... + 1573915.

It is an arithmetic number, because the mean of its divisors is an integer number (23608305).

Almost surely, 2^91285417 is an apocalyptic number.

It is an amenable number.

91285417 is a deficient number, since it is larger than the sum of its proper divisors (3147803).

91285417 is a wasteful number, since it uses less digits than its factorization.

91285417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147802.

The product of its digits is 20160, while the sum is 37.

The square root of 91285417 is about 9554.3402179324. The cubic root of 91285417 is about 450.2639061052.

The spelling of 91285417 in words is "ninety-one million, two hundred eighty-five thousand, four hundred seventeen".