84447427 has 2 divisors, whose sum is σ = 84447428. Its totient is φ = 84447426.

The previous prime is 84447401. The next prime is 84447443. The reversal of 84447427 is 72474448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84447427 - 2¹¹ = 84445379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84447427.

It is not a weakly prime, because it can be changed into another prime (84447487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42223713 + 42223714.

It is an arithmetic number, because the mean of its divisors is an integer number (42223714).

Almost surely, 2^84447427 is an apocalyptic number.

84447427 is a deficient number, since it is larger than the sum of its proper divisors (1).

84447427 is an equidigital number, since it uses as much as digits as its factorization.

84447427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200704, while the sum is 40.

The square root of 84447427 is about 9189.5281162854. The cubic root of 84447427 is about 438.7281228151.

The spelling of 84447427 in words is "eighty-four million, four hundred forty-seven thousand, four hundred twenty-seven".