85579591 has 4 divisors (see below), whose sum is σ = 90083800. Its totient is φ = 81075384.

The previous prime is 85579583. The next prime is 85579633. The reversal of 85579591 is 19597558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85579591 - 2³ = 85579583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85579541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252076 + ... + 2252113.

It is an arithmetic number, because the mean of its divisors is an integer number (22520950).

Almost surely, 2^85579591 is an apocalyptic number.

85579591 is a deficient number, since it is larger than the sum of its proper divisors (4504209).

85579591 is a wasteful number, since it uses less digits than its factorization.

85579591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504208.

The product of its digits is 567000, while the sum is 49.

The square root of 85579591 is about 9250.9237917086. The cubic root of 85579591 is about 440.6800623374.

The spelling of 85579591 in words is "eighty-five million, five hundred seventy-nine thousand, five hundred ninety-one".