85326721 has 4 divisors (see below), whose sum is σ = 85345200. Its totient is φ = 85308244.

The previous prime is 85326691. The next prime is 85326727. The reversal of 85326721 is 12762358.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 85326721 - 2¹⁵ = 85293953 is a prime.

It is a super-2 number, since 2×85326721² = 14561298633223682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85326727) 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, 4350 + ... + 13768.

It is an arithmetic number, because the mean of its divisors is an integer number (21336300).

Almost surely, 2^85326721 is an apocalyptic number.

It is an amenable number.

85326721 is a deficient number, since it is larger than the sum of its proper divisors (18479).

85326721 is an equidigital number, since it uses as much as digits as its factorization.

85326721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18478.

The product of its digits is 20160, while the sum is 34.

The square root of 85326721 is about 9237.2463970601. The cubic root of 85326721 is about 440.2455946403.

The spelling of 85326721 in words is "eighty-five million, three hundred twenty-six thousand, seven hundred twenty-one".