84686423 has 2 divisors, whose sum is σ = 84686424. Its totient is φ = 84686422.

The previous prime is 84686369. The next prime is 84686447. The reversal of 84686423 is 32468648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84686423 - 2⁶ = 84686359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84686453) 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, 42343211 + 42343212.

It is an arithmetic number, because the mean of its divisors is an integer number (42343212).

Almost surely, 2^84686423 is an apocalyptic number.

84686423 is a deficient number, since it is larger than the sum of its proper divisors (1).

84686423 is an equidigital number, since it uses as much as digits as its factorization.

84686423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 41.

The square root of 84686423 is about 9202.5226432756. The cubic root of 84686423 is about 439.1416167834.

The spelling of 84686423 in words is "eighty-four million, six hundred eighty-six thousand, four hundred twenty-three".