85584731 has 4 divisors (see below), whose sum is σ = 86342232. Its totient is φ = 84827232.

The previous prime is 85584701. The next prime is 85584739. The reversal of 85584731 is 13748558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13748558 = 2 ⋅6874279.

It is a cyclic number.

It is not a de Polignac number, because 85584731 - 2²⁶ = 18475867 is a prime.

It is a super-2 number, since 2×85584731² = 14649492360684722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85584739) 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, 378581 + ... + 378806.

It is an arithmetic number, because the mean of its divisors is an integer number (21585558).

Almost surely, 2^85584731 is an apocalyptic number.

85584731 is a deficient number, since it is larger than the sum of its proper divisors (757501).

85584731 is a wasteful number, since it uses less digits than its factorization.

85584731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757500.

The product of its digits is 134400, while the sum is 41.

The square root of 85584731 is about 9251.2015976304. The cubic root of 85584731 is about 440.6888847297.

The spelling of 85584731 in words is "eighty-five million, five hundred eighty-four thousand, seven hundred thirty-one".