85437679 has 2 divisors, whose sum is σ = 85437680. Its totient is φ = 85437678.

The previous prime is 85437659. The next prime is 85437707. The reversal of 85437679 is 97673458.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85437679 - 2⁵ = 85437647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85437659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42718839 + 42718840.

It is an arithmetic number, because the mean of its divisors is an integer number (42718840).

Almost surely, 2^85437679 is an apocalyptic number.

85437679 is a deficient number, since it is larger than the sum of its proper divisors (1).

85437679 is an equidigital number, since it uses as much as digits as its factorization.

85437679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 85437679 is about 9243.2504564141. The cubic root of 85437679 is about 440.4363422797.

The spelling of 85437679 in words is "eighty-five million, four hundred thirty-seven thousand, six hundred seventy-nine".