91080171 has 36 divisors (see below), whose sum is σ = 164822112. Its totient is φ = 48039264.

The previous prime is 91080163. The next prime is 91080179. The reversal of 91080171 is 17108019.

It is an interprime number because it is at equal distance from previous prime (91080163) and next prime (91080179).

It is not a de Polignac number, because 91080171 - 2³ = 91080163 is a prime.

It is a super-3 number, since 3×91080171³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91080179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2211 + ... + 13676.

It is an arithmetic number, because the mean of its divisors is an integer number (4578392).

Almost surely, 2^91080171 is an apocalyptic number.

91080171 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91080171 is a deficient number, since it is larger than the sum of its proper divisors (73741941).

91080171 is a wasteful number, since it uses less digits than its factorization.

91080171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15920 (or 15910 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 91080171 is about 9543.5931912462. The cubic root of 91080171 is about 449.9261953033.

The spelling of 91080171 in words is "ninety-one million, eighty thousand, one hundred seventy-one".