85368021 has 4 divisors (see below), whose sum is σ = 113824032. Its totient is φ = 56912012.

The previous prime is 85368013. The next prime is 85368043. The reversal of 85368021 is 12086358.

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.

It is a cyclic number.

It is not a de Polignac number, because 85368021 - 2³ = 85368013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85368011) 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, 14228001 + ... + 14228006.

It is an arithmetic number, because the mean of its divisors is an integer number (28456008).

Almost surely, 2^85368021 is an apocalyptic number.

It is an amenable number.

85368021 is a deficient number, since it is larger than the sum of its proper divisors (28456011).

85368021 is a wasteful number, since it uses less digits than its factorization.

85368021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28456010.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 85368021 is about 9239.4816413043. The cubic root of 85368021 is about 440.3166126837.

The spelling of 85368021 in words is "eighty-five million, three hundred sixty-eight thousand, twenty-one".