84591223 has 2 divisors, whose sum is σ = 84591224. Its totient is φ = 84591222.

The previous prime is 84591197. The next prime is 84591239. The reversal of 84591223 is 32219548.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84591223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84591253) 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, 42295611 + 42295612.

It is an arithmetic number, because the mean of its divisors is an integer number (42295612).

Almost surely, 2^84591223 is an apocalyptic number.

84591223 is a deficient number, since it is larger than the sum of its proper divisors (1).

84591223 is an equidigital number, since it uses as much as digits as its factorization.

84591223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 84591223 is about 9197.3486940531. The cubic root of 84591223 is about 438.9770018203.

The spelling of 84591223 in words is "eighty-four million, five hundred ninety-one thousand, two hundred twenty-three".