85230921 has 4 divisors (see below), whose sum is σ = 113641232. Its totient is φ = 56820612.

The previous prime is 85230919. The next prime is 85230949. The reversal of 85230921 is 12903258.

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 not a de Polignac number, because 85230921 - 2¹ = 85230919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85230991) 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, 14205151 + ... + 14205156.

It is an arithmetic number, because the mean of its divisors is an integer number (28410308).

Almost surely, 2^85230921 is an apocalyptic number.

It is an amenable number.

85230921 is a deficient number, since it is larger than the sum of its proper divisors (28410311).

85230921 is a wasteful number, since it uses less digits than its factorization.

85230921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28410310.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 85230921 is about 9232.0594127204. The cubic root of 85230921 is about 440.0807720173.

The spelling of 85230921 in words is "eighty-five million, two hundred thirty thousand, nine hundred twenty-one".