85897321 has 4 divisors (see below), whose sum is σ = 85916500. Its totient is φ = 85878144.

The previous prime is 85897307. The next prime is 85897363. The reversal of 85897321 is 12379858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56791296 + 29106025 = 7536^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 85897321 - 2¹³ = 85889129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85897381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (21479125).

Almost surely, 2^85897321 is an apocalyptic number.

It is an amenable number.

85897321 is a deficient number, since it is larger than the sum of its proper divisors (19179).

85897321 is a wasteful number, since it uses less digits than its factorization.

85897321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19178.

The product of its digits is 120960, while the sum is 43.

The square root of 85897321 is about 9268.0807614090. The cubic root of 85897321 is about 441.2247574418.

The spelling of 85897321 in words is "eighty-five million, eight hundred ninety-seven thousand, three hundred twenty-one".