11972079889 has 63 divisors (see below), whose sum is σ = 15900262651. Its totient is φ = 9007207440.

The previous prime is 11972079887. The next prime is 11972079893. The reversal of 11972079889 is 98897027911.

The square root of 11972079889 is 109417.

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

It can be written as a sum of positive squares in only one way, i.e., 6277868289 + 5694211600 = 79233^2 + 75460^2 .

It is not a de Polignac number, because 11972079889 - 2¹ = 11972079887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11972079883) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 412830327 + ... + 412830355.

Almost surely, 2^11972079889 is an apocalyptic number.

11972079889 is the 109417-th square number.

11972079889 is the 54709-th centered octagonal number.

It is an amenable number.

11972079889 is a deficient number, since it is larger than the sum of its proper divisors (3928182762).

11972079889 is an frugal number, since it uses more digits than its factorization.

11972079889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 61.

The spelling of 11972079889 in words is "eleven billion, nine hundred seventy-two million, seventy-nine thousand, eight hundred eighty-nine".