84219623 has 2 divisors, whose sum is σ = 84219624. Its totient is φ = 84219622.

The previous prime is 84219601. The next prime is 84219631. The reversal of 84219623 is 32691248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84219623 - 2²⁴ = 67442407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84209623) 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, 42109811 + 42109812.

It is an arithmetic number, because the mean of its divisors is an integer number (42109812).

Almost surely, 2^84219623 is an apocalyptic number.

84219623 is a deficient number, since it is larger than the sum of its proper divisors (1).

84219623 is an equidigital number, since it uses as much as digits as its factorization.

84219623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 84219623 is about 9177.1249855279. The cubic root of 84219623 is about 438.3332656087. Note that the first 3 decimals are identical.

The spelling of 84219623 in words is "eighty-four million, two hundred nineteen thousand, six hundred twenty-three".