8390605 has 8 divisors (see below), whose sum is σ = 10661112. Its totient is φ = 6317568.

The previous prime is 8390593. The next prime is 8390623. The reversal of 8390605 is 5060938.

8390605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3849444 + 4541161 = 1962^2 + 2131^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8390605 - 2⁹ = 8390093 is a prime.

It is a Duffinian number.

8390605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49272 + ... + 49441.

It is an arithmetic number, because the mean of its divisors is an integer number (1332639).

Almost surely, 2^8390605 is an apocalyptic number.

8390605 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8390605 is a deficient number, since it is larger than the sum of its proper divisors (2270507).

8390605 is a wasteful number, since it uses less digits than its factorization.

8390605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98735.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 8390605 is about 2896.6541043072. The cubic root of 8390605 is about 203.2034570293.

The spelling of 8390605 in words is "eight million, three hundred ninety thousand, six hundred five".