7972168369 has 9 divisors (see below), whose sum is σ = 8763876331. Its totient is φ = 7246532920.

The previous prime is 7972168361. The next prime is 7972168397. The reversal of 7972168369 is 9638612797.

The square root of 7972168369 is 89287.

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., 7220750625 + 751417744 = 84975^2 + 27412^2 .

It is not a de Polignac number, because 7972168369 - 2³ = 7972168361 is a prime.

It is a super-2 number, since 2×7972168369² (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 (7972168361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 978099 + ... + 986215.

Almost surely, 2^7972168369 is an apocalyptic number.

7972168369 is the 89287-th square number.

7972168369 is the 44644-th centered octagonal number.

It is an amenable number.

7972168369 is a deficient number, since it is larger than the sum of its proper divisors (791707962).

7972168369 is an frugal number, since it uses more digits than its factorization.

7972168369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16256 (or 8128 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The cubic root of 7972168369 is about 1997.6780026240.

The spelling of 7972168369 in words is "seven billion, nine hundred seventy-two million, one hundred sixty-eight thousand, three hundred sixty-nine".