91914643 has 2 divisors, whose sum is σ = 91914644. Its totient is φ = 91914642.

The previous prime is 91914637. The next prime is 91914649. The reversal of 91914643 is 34641919.

It is a balanced prime because it is at equal distance from previous prime (91914637) and next prime (91914649).

It is a cyclic number.

It is not a de Polignac number, because 91914643 - 2⁹ = 91914131 is a prime.

It is not a weakly prime, because it can be changed into another prime (91914649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45957321 + 45957322.

It is an arithmetic number, because the mean of its divisors is an integer number (45957322).

Almost surely, 2^91914643 is an apocalyptic number.

91914643 is a deficient number, since it is larger than the sum of its proper divisors (1).

91914643 is an equidigital number, since it uses as much as digits as its factorization.

91914643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 91914643 is about 9587.2124728724. The cubic root of 91914643 is about 451.2960873015.

The spelling of 91914643 in words is "ninety-one million, nine hundred fourteen thousand, six hundred forty-three".