91414891 has 2 divisors, whose sum is σ = 91414892. Its totient is φ = 91414890.

The previous prime is 91414889. The next prime is 91414913. The reversal of 91414891 is 19841419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91414891 - 2¹ = 91414889 is a prime.

Together with 91414889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91414891.

It is not a weakly prime, because it can be changed into another prime (91414091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45707445 + 45707446.

It is an arithmetic number, because the mean of its divisors is an integer number (45707446).

Almost surely, 2^91414891 is an apocalyptic number.

91414891 is a deficient number, since it is larger than the sum of its proper divisors (1).

91414891 is an equidigital number, since it uses as much as digits as its factorization.

91414891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 91414891 is about 9561.1134811799. The cubic root of 91414891 is about 450.4766817075.

The spelling of 91414891 in words is "ninety-one million, four hundred fourteen thousand, eight hundred ninety-one".