85323921 has 4 divisors (see below), whose sum is σ = 113765232. Its totient is φ = 56882612.

The previous prime is 85323913. The next prime is 85323923. The reversal of 85323921 is 12932358.

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.

It is a cyclic number.

It is not a de Polignac number, because 85323921 - 2³ = 85323913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85323923) 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, 14220651 + ... + 14220656.

It is an arithmetic number, because the mean of its divisors is an integer number (28441308).

Almost surely, 2^85323921 is an apocalyptic number.

It is an amenable number.

85323921 is a deficient number, since it is larger than the sum of its proper divisors (28441311).

85323921 is a wasteful number, since it uses less digits than its factorization.

85323921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28441310.

The product of its digits is 12960, while the sum is 33.

The square root of 85323921 is about 9237.0948354989. The cubic root of 85323921 is about 440.2407790283.

The spelling of 85323921 in words is "eighty-five million, three hundred twenty-three thousand, nine hundred twenty-one".