91075861 has 8 divisors (see below), whose sum is σ = 95206400. Its totient is φ = 87019920.

The previous prime is 91075843. The next prime is 91075871. The reversal of 91075861 is 16857019.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91075861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91075861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91075871) 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, 16146 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (11900800).

Almost surely, 2^91075861 is an apocalyptic number.

It is an amenable number.

91075861 is a deficient number, since it is larger than the sum of its proper divisors (4130539).

91075861 is a wasteful number, since it uses less digits than its factorization.

91075861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37299.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 91075861 is about 9543.3673826381. The cubic root of 91075861 is about 449.9190982134.

The spelling of 91075861 in words is "ninety-one million, seventy-five thousand, eight hundred sixty-one".