84570679 has 2 divisors, whose sum is σ = 84570680. Its totient is φ = 84570678.

The previous prime is 84570643. The next prime is 84570709. The reversal of 84570679 is 97607548.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84570679 - 2¹³ = 84562487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84570179) 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, 42285339 + 42285340.

It is an arithmetic number, because the mean of its divisors is an integer number (42285340).

Almost surely, 2^84570679 is an apocalyptic number.

84570679 is a deficient number, since it is larger than the sum of its proper divisors (1).

84570679 is an equidigital number, since it uses as much as digits as its factorization.

84570679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 84570679 is about 9196.2317826379. The cubic root of 84570679 is about 438.9414619878.

The spelling of 84570679 in words is "eighty-four million, five hundred seventy thousand, six hundred seventy-nine".