9969799569 has 4 divisors (see below), whose sum is σ = 13293066096. Its totient is φ = 6646533044.

The previous prime is 9969799523. The next prime is 9969799601. The reversal of 9969799569 is 9659979699.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9969799569 - 2¹⁵ = 9969766801 is a prime.

It is a super-2 number, since 2×9969799569² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9969799494 and 9969799503.

It is not an unprimeable number, because it can be changed into a prime (9969799769) 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, 1661633259 + ... + 1661633264.

It is an arithmetic number, because the mean of its divisors is an integer number (3323266524).

Almost surely, 2^9969799569 is an apocalyptic number.

It is an amenable number.

9969799569 is a deficient number, since it is larger than the sum of its proper divisors (3323266527).

9969799569 is a wasteful number, since it uses less digits than its factorization.

9969799569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323266526.

The product of its digits is 669615660, while the sum is 78.

The square root of 9969799569 is about 99848.8836642654. The cubic root of 9969799569 is about 2152.2636745028.

The spelling of 9969799569 in words is "nine billion, nine hundred sixty-nine million, seven hundred ninety-nine thousand, five hundred sixty-nine".