91248271 has 2 divisors, whose sum is σ = 91248272. Its totient is φ = 91248270.

The previous prime is 91248263. The next prime is 91248281. The reversal of 91248271 is 17284219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91248271 - 2³ = 91248263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91248281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45624135 + 45624136.

It is an arithmetic number, because the mean of its divisors is an integer number (45624136).

Almost surely, 2^91248271 is an apocalyptic number.

91248271 is a deficient number, since it is larger than the sum of its proper divisors (1).

91248271 is an equidigital number, since it uses as much as digits as its factorization.

91248271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 91248271 is about 9552.3960868465. The cubic root of 91248271 is about 450.2028237960.

It can be divided in two parts, 91248 and 271, that added together give a palindrome (91519).

The spelling of 91248271 in words is "ninety-one million, two hundred forty-eight thousand, two hundred seventy-one".