85709583 has 10 divisors (see below), whose sum is σ = 128035424. Its totient is φ = 57139668.

The previous prime is 85709579. The next prime is 85709593. The reversal of 85709583 is 38590758.

It is not a de Polignac number, because 85709583 - 2² = 85709579 is a prime.

It is a super-2 number, since 2×85709583² = 14692265236067778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85709543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 528991 + ... + 529152.

Almost surely, 2^85709583 is an apocalyptic number.

85709583 is a deficient number, since it is larger than the sum of its proper divisors (42325841).

85709583 is a wasteful number, since it uses less digits than its factorization.

85709583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058155 (or 1058146 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 85709583 is about 9257.9470186430. The cubic root of 85709583 is about 440.9030746310.

The spelling of 85709583 in words is "eighty-five million, seven hundred nine thousand, five hundred eighty-three".