91171141 has 4 divisors (see below), whose sum is σ = 91889152. Its totient is φ = 90453132.

The previous prime is 91171123. The next prime is 91171147. The reversal of 91171141 is 14117119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14117119 = 2459 ⋅5741.

It is a cyclic number.

It is not a de Polignac number, because 91171141 - 2¹⁵ = 91138373 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 (91171147) 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, 358815 + ... + 359068.

It is an arithmetic number, because the mean of its divisors is an integer number (22972288).

Almost surely, 2^91171141 is an apocalyptic number.

It is an amenable number.

91171141 is a deficient number, since it is larger than the sum of its proper divisors (718011).

91171141 is a wasteful number, since it uses less digits than its factorization.

91171141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718010.

The product of its digits is 252, while the sum is 25.

The square root of 91171141 is about 9548.3580263834. The cubic root of 91171141 is about 450.0759394475.

The spelling of 91171141 in words is "ninety-one million, one hundred seventy-one thousand, one hundred forty-one".