12279520969 has 3 divisors (see below), whose sum is σ = 12279631783. Its totient is φ = 12279410156.

The previous prime is 12279520961. The next prime is 12279520997. The reversal of 12279520969 is 96902597221.

The square root of 12279520969 is 110813.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96902597221 = 41 ⋅2363477981.

It can be written as a sum of positive squares in only one way, i.e., 3706983225 + 8572537744 = 60885^2 + 92588^2 .

It is not a de Polignac number, because 12279520969 - 2³ = 12279520961 is a prime.

It is a super-2 number, since 2×12279520969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12279520961) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55407 + ... + 166219.

Almost surely, 2^12279520969 is an apocalyptic number.

12279520969 is the 110813-rd square number.

12279520969 is the 55407-th centered octagonal number.

It is an amenable number.

12279520969 is a deficient number, since it is larger than the sum of its proper divisors (110814).

12279520969 is an frugal number, since it uses more digits than its factorization.

12279520969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221626 (or 110813 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 12279520969 in words is "twelve billion, two hundred seventy-nine million, five hundred twenty thousand, nine hundred sixty-nine".