85773721 has 8 divisors (see below), whose sum is σ = 99075744. Its totient is φ = 73389120.

The previous prime is 85773719. The next prime is 85773767. The reversal of 85773721 is 12737758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85773721 - 2¹ = 85773719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85773781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229155 + ... + 229528.

It is an arithmetic number, because the mean of its divisors is an integer number (12384468).

Almost surely, 2^85773721 is an apocalyptic number.

It is an amenable number.

85773721 is a deficient number, since it is larger than the sum of its proper divisors (13302023).

85773721 is a wasteful number, since it uses less digits than its factorization.

85773721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458711.

The product of its digits is 82320, while the sum is 40.

The square root of 85773721 is about 9261.4103137697. The cubic root of 85773721 is about 441.0130257378.

It can be divided in two parts, 857737 and 21, that added together give a palindrome (857758).

The spelling of 85773721 in words is "eighty-five million, seven hundred seventy-three thousand, seven hundred twenty-one".