9999505 has 8 divisors (see below), whose sum is σ = 12118824. Its totient is φ = 7920000.

The previous prime is 9999481. The next prime is 9999511. The reversal of 9999505 is 5059999.

It can be written as a sum of positive squares in 4 ways, for example, as 506944 + 9492561 = 712^2 + 3081^2 .

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

It is not a de Polignac number, because 9999505 - 2¹³ = 9991313 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, 9396 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (1514853).

Almost surely, 2^9999505 is an apocalyptic number.

It is an amenable number.

9999505 is a deficient number, since it is larger than the sum of its proper divisors (2119319).

9999505 is a wasteful number, since it uses less digits than its factorization.

9999505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19907.

The product of its (nonzero) digits is 164025, while the sum is 46.

The square root of 9999505 is about 3162.1993928277. The cubic root of 9999505 is about 215.4399141273.

The spelling of 9999505 in words is "nine million, nine hundred ninety-nine thousand, five hundred five".