91895291 has 2 divisors, whose sum is σ = 91895292. Its totient is φ = 91895290.

The previous prime is 91895239. The next prime is 91895299. The reversal of 91895291 is 19259819.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19259819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91895291 - 2¹⁰ = 91894267 is a prime.

It is not a weakly prime, because it can be changed into another prime (91895299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45947645 + 45947646.

It is an arithmetic number, because the mean of its divisors is an integer number (45947646).

Almost surely, 2^91895291 is an apocalyptic number.

91895291 is a deficient number, since it is larger than the sum of its proper divisors (1).

91895291 is an equidigital number, since it uses as much as digits as its factorization.

91895291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 44.

The square root of 91895291 is about 9586.2031587068. The cubic root of 91895291 is about 451.2644126427.

The spelling of 91895291 in words is "ninety-one million, eight hundred ninety-five thousand, two hundred ninety-one".