85579693 has 2 divisors, whose sum is σ = 85579694. Its totient is φ = 85579692.

The previous prime is 85579691. The next prime is 85579699. The reversal of 85579693 is 39697558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74269924 + 11309769 = 8618^2 + 3363^2 .

It is a cyclic number.

It is not a de Polignac number, because 85579693 - 2¹ = 85579691 is a prime.

Together with 85579691, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85579693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85579691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42789846 + 42789847.

It is an arithmetic number, because the mean of its divisors is an integer number (42789847).

Almost surely, 2^85579693 is an apocalyptic number.

It is an amenable number.

85579693 is a deficient number, since it is larger than the sum of its proper divisors (1).

85579693 is an equidigital number, since it uses as much as digits as its factorization.

85579693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 52.

The square root of 85579693 is about 9250.9293046699. The cubic root of 85579693 is about 440.6802374156.

The spelling of 85579693 in words is "eighty-five million, five hundred seventy-nine thousand, six hundred ninety-three".