84427823 has 2 divisors, whose sum is σ = 84427824. Its totient is φ = 84427822.

The previous prime is 84427807. The next prime is 84427859. The reversal of 84427823 is 32872448.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84427823 - 2⁴ = 84427807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84427873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42213911 + 42213912.

It is an arithmetic number, because the mean of its divisors is an integer number (42213912).

Almost surely, 2^84427823 is an apocalyptic number.

84427823 is a deficient number, since it is larger than the sum of its proper divisors (1).

84427823 is an equidigital number, since it uses as much as digits as its factorization.

84427823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 38.

The square root of 84427823 is about 9188.4614054802. The cubic root of 84427823 is about 438.6941707574.

The spelling of 84427823 in words is "eighty-four million, four hundred twenty-seven thousand, eight hundred twenty-three".