11972023205969 has 2 divisors, whose sum is σ = 11972023205970. Its totient is φ = 11972023205968.

The previous prime is 11972023205963. The next prime is 11972023205971. The reversal of 11972023205969 is 96950232027911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7196814905344 + 4775208300625 = 2682688^2 + 2185225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11972023205969 - 2²⁰ = 11972022157393 is a prime.

It is a super-2 number, since 2×11972023205969² (a number of 27 digits) contains 22 as substring.

Together with 11972023205971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11972023205963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5986011602984 + 5986011602985.

It is an arithmetic number, because the mean of its divisors is an integer number (5986011602985).

Almost surely, 2^{11972023205969} is an apocalyptic number.

It is an amenable number.

11972023205969 is a deficient number, since it is larger than the sum of its proper divisors (1).

11972023205969 is an equidigital number, since it uses as much as digits as its factorization.

11972023205969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 11972023205969 in words is "eleven trillion, nine hundred seventy-two billion, twenty-three million, two hundred five thousand, nine hundred sixty-nine".