84427807 has 2 divisors, whose sum is σ = 84427808. Its totient is φ = 84427806.

The previous prime is 84427801. The next prime is 84427823. The reversal of 84427807 is 70872448.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84427807 - 2³ = 84427799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84427807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84427801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42213903 + 42213904.

It is an arithmetic number, because the mean of its divisors is an integer number (42213904).

Almost surely, 2^84427807 is an apocalyptic number.

84427807 is a deficient number, since it is larger than the sum of its proper divisors (1).

84427807 is an equidigital number, since it uses as much as digits as its factorization.

84427807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 84427807 is about 9188.4605348230. The cubic root of 84427807 is about 438.6941430449.

The spelling of 84427807 in words is "eighty-four million, four hundred twenty-seven thousand, eight hundred seven".