9996505 has 4 divisors (see below), whose sum is σ = 11995812. Its totient is φ = 7997200.

The previous prime is 9996491. The next prime is 9996509. The reversal of 9996505 is 5056999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5056999 = 31 ⋅163129.

It can be written as a sum of positive squares in 2 ways, for example, as 1157776 + 8838729 = 1076^2 + 2973^2 .

It is not a de Polignac number, because 9996505 - 2¹³ = 9988313 is a prime.

It is a super-2 number, since 2×9996505² = 199860224430050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9996509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999646 + ... + 999655.

It is an arithmetic number, because the mean of its divisors is an integer number (2998953).

Almost surely, 2^9996505 is an apocalyptic number.

It is an amenable number.

9996505 is a deficient number, since it is larger than the sum of its proper divisors (1999307).

9996505 is a wasteful number, since it uses less digits than its factorization.

9996505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999306.

The product of its (nonzero) digits is 109350, while the sum is 43.

The square root of 9996505 is about 3161.7250038547. The cubic root of 9996505 is about 215.4183669144.

It can be divided in two parts, 9996 and 505, that added together give a palindrome (10501).

The spelling of 9996505 in words is "nine million, nine hundred ninety-six thousand, five hundred five".