91924543 has 2 divisors, whose sum is σ = 91924544. Its totient is φ = 91924542.

The previous prime is 91924541. The next prime is 91924561. The reversal of 91924543 is 34542919.

It is a weak prime.

It is an emirp because it is prime and its reverse (34542919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91924543 - 2¹ = 91924541 is a prime.

Together with 91924541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91924541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45962271 + 45962272.

It is an arithmetic number, because the mean of its divisors is an integer number (45962272).

Almost surely, 2^91924543 is an apocalyptic number.

91924543 is a deficient number, since it is larger than the sum of its proper divisors (1).

91924543 is an equidigital number, since it uses as much as digits as its factorization.

91924543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 91924543 is about 9587.7287717165. The cubic root of 91924543 is about 451.3122895472.

The spelling of 91924543 in words is "ninety-one million, nine hundred twenty-four thousand, five hundred forty-three".