8009905 has 8 divisors (see below), whose sum is σ = 9647784. Its totient is φ = 6384000.

The previous prime is 8009893. The next prime is 8009927. The reversal of 8009905 is 5099008.

It can be written as a sum of positive squares in 4 ways, for example, as 2585664 + 5424241 = 1608^2 + 2329^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-8009905 is a prime.

It is a Duffinian 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, 1446 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (1205973).

Almost surely, 2^8009905 is an apocalyptic number.

It is an amenable number.

8009905 is a deficient number, since it is larger than the sum of its proper divisors (1637879).

8009905 is a wasteful number, since it uses less digits than its factorization.

8009905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 8009905 is about 2830.1775562675. The cubic root of 8009905 is about 200.0825076244.

The spelling of 8009905 in words is "eight million, nine thousand, nine hundred five".