91286071 has 4 divisors (see below), whose sum is σ = 91324512. Its totient is φ = 91247632.

The previous prime is 91286059. The next prime is 91286081. The reversal of 91286071 is 17068219.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91286071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91286081) 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, 15406 + ... + 20491.

It is an arithmetic number, because the mean of its divisors is an integer number (22831128).

Almost surely, 2^91286071 is an apocalyptic number.

91286071 is a deficient number, since it is larger than the sum of its proper divisors (38441).

91286071 is a wasteful number, since it uses less digits than its factorization.

91286071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38440.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 91286071 is about 9554.3744431543. The cubic root of 91286071 is about 450.2649813843.

The spelling of 91286071 in words is "ninety-one million, two hundred eighty-six thousand, seventy-one".