85668493 has 4 divisors (see below), whose sum is σ = 86842108. Its totient is φ = 84494880.

The previous prime is 85668487. The next prime is 85668497. The reversal of 85668493 is 39486658.

It is a happy number.

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 59320804 + 26347689 = 7702^2 + 5133^2 .

It is a cyclic number.

It is not a de Polignac number, because 85668493 - 2¹³ = 85660301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85668497) 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, 586698 + ... + 586843.

It is an arithmetic number, because the mean of its divisors is an integer number (21710527).

Almost surely, 2^85668493 is an apocalyptic number.

It is an amenable number.

85668493 is a deficient number, since it is larger than the sum of its proper divisors (1173615).

85668493 is a wasteful number, since it uses less digits than its factorization.

85668493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173614.

The product of its digits is 1244160, while the sum is 49.

The square root of 85668493 is about 9255.7275781000. The cubic root of 85668493 is about 440.8326056411.

The spelling of 85668493 in words is "eighty-five million, six hundred sixty-eight thousand, four hundred ninety-three".