91742271 has 4 divisors (see below), whose sum is σ = 122323032. Its totient is φ = 61161512.

The previous prime is 91742269. The next prime is 91742281. The reversal of 91742271 is 17224719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17224719 = 3 ⋅5741573.

It is a cyclic number.

It is not a de Polignac number, because 91742271 - 2¹ = 91742269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91742221) 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 3 ways as a sum of consecutive naturals, for example, 15290376 + ... + 15290381.

It is an arithmetic number, because the mean of its divisors is an integer number (30580758).

Almost surely, 2^91742271 is an apocalyptic number.

91742271 is a deficient number, since it is larger than the sum of its proper divisors (30580761).

91742271 is a wasteful number, since it uses less digits than its factorization.

91742271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30580760.

The product of its digits is 7056, while the sum is 33.

The square root of 91742271 is about 9578.2185713211. The cubic root of 91742271 is about 451.0137982645.

The spelling of 91742271 in words is "ninety-one million, seven hundred forty-two thousand, two hundred seventy-one".