84427859 has 2 divisors, whose sum is σ = 84427860. Its totient is φ = 84427858.

The previous prime is 84427823. The next prime is 84427867. The reversal of 84427859 is 95872448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84427859 - 2¹² = 84423763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84427459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42213929 + 42213930.

It is an arithmetic number, because the mean of its divisors is an integer number (42213930).

Almost surely, 2^84427859 is an apocalyptic number.

84427859 is a deficient number, since it is larger than the sum of its proper divisors (1).

84427859 is an equidigital number, since it uses as much as digits as its factorization.

84427859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 47.

The square root of 84427859 is about 9188.4633644587. The cubic root of 84427859 is about 438.6942331104.

The spelling of 84427859 in words is "eighty-four million, four hundred twenty-seven thousand, eight hundred fifty-nine".