8490005 has 4 divisors (see below), whose sum is σ = 10188012. Its totient is φ = 6792000.

The previous prime is 8489969. The next prime is 8490019. The reversal of 8490005 is 5000948.

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 2007889 + 6482116 = 1417^2 + 2546^2 .

It is not a de Polignac number, because 8490005 - 2¹⁰ = 8488981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848996 + ... + 849005.

It is an arithmetic number, because the mean of its divisors is an integer number (2547003).

Almost surely, 2^8490005 is an apocalyptic number.

It is an amenable number.

8490005 is a deficient number, since it is larger than the sum of its proper divisors (1698007).

8490005 is a wasteful number, since it uses less digits than its factorization.

8490005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698006.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 8490005 is about 2913.7613148643. The cubic root of 8490005 is about 204.0027312847.

The spelling of 8490005 in words is "eight million, four hundred ninety thousand, five".