85747679 has 2 divisors, whose sum is σ = 85747680. Its totient is φ = 85747678.

The previous prime is 85747637. The next prime is 85747699. The reversal of 85747679 is 97674758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85747679 - 2²⁰ = 84699103 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85747679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85747699) 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, 42873839 + 42873840.

It is an arithmetic number, because the mean of its divisors is an integer number (42873840).

Almost surely, 2^85747679 is an apocalyptic number.

85747679 is a deficient number, since it is larger than the sum of its proper divisors (1).

85747679 is an equidigital number, since it uses as much as digits as its factorization.

85747679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 53.

The square root of 85747679 is about 9260.0042656578. The cubic root of 85747679 is about 440.9683888195.

The spelling of 85747679 in words is "eighty-five million, seven hundred forty-seven thousand, six hundred seventy-nine".