8505493 has 4 divisors (see below), whose sum is σ = 8666028. Its totient is φ = 8344960.

The previous prime is 8505487. The next prime is 8505509. The reversal of 8505493 is 3945058.

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 3090564 + 5414929 = 1758^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 8505493 - 2⁵ = 8505461 is a prime.

It is a super-2 number, since 2×8505493² = 144686822346098, which contains 22 as substring.

It is a Duffinian number.

8505493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8505403) 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, 80188 + ... + 80293.

It is an arithmetic number, because the mean of its divisors is an integer number (2166507).

Almost surely, 2^8505493 is an apocalyptic number.

It is an amenable number.

8505493 is a deficient number, since it is larger than the sum of its proper divisors (160535).

8505493 is a wasteful number, since it uses less digits than its factorization.

8505493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160534.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 8505493 is about 2916.4178370048. The cubic root of 8505493 is about 204.1267074558.

It can be divided in two parts, 8505 and 493, that added together give a palindrome (8998).

The spelling of 8505493 in words is "eight million, five hundred five thousand, four hundred ninety-three".