8400005 has 8 divisors (see below), whose sum is σ = 10245624. Its totient is φ = 6609600.

The previous prime is 8399987. The next prime is 8400011. The reversal of 8400005 is 5000048.

8400005 = T₄₉₄ + T₄₉₅ + ... + T₅₅₄.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 8392609 = 86^2 + 2897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8400005 - 2¹⁴ = 8383621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13466 + ... + 14075.

It is an arithmetic number, because the mean of its divisors is an integer number (1280703).

Almost surely, 2^8400005 is an apocalyptic number.

It is an amenable number.

8400005 is a deficient number, since it is larger than the sum of its proper divisors (1845619).

8400005 is a wasteful number, since it uses less digits than its factorization.

8400005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27607.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 8400005 is about 2898.2762118197. The cubic root of 8400005 is about 203.2793116962.

The spelling of 8400005 in words is "eight million, four hundred thousand, five".