9945505 has 4 divisors (see below), whose sum is σ = 11934612. Its totient is φ = 7956400.

The previous prime is 9945461. The next prime is 9945511. The reversal of 9945505 is 5055499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5055499 = 739 ⋅6841.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 6170256 = 1943^2 + 2484^2 .

It is not a de Polignac number, because 9945505 - 2¹¹ = 9943457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994546 + ... + 994555.

It is an arithmetic number, because the mean of its divisors is an integer number (2983653).

Almost surely, 2^9945505 is an apocalyptic number.

It is an amenable number.

9945505 is a deficient number, since it is larger than the sum of its proper divisors (1989107).

9945505 is a wasteful number, since it uses less digits than its factorization.

9945505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989106.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 9945505 is about 3153.6494732294. The cubic root of 9945505 is about 215.0514028888.

The spelling of 9945505 in words is "nine million, nine hundred forty-five thousand, five hundred five".