7172120169 has 24 divisors (see below), whose sum is σ = 10426291200. Its totient is φ = 4750784640.

The previous prime is 7172120159. The next prime is 7172120173. The reversal of 7172120169 is 9610212717.

It is a happy number.

It is not a de Polignac number, because 7172120169 - 2²⁵ = 7138565737 is a prime.

It is a super-2 number, since 2×7172120169² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7172120129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1026849 + ... + 1033809.

It is an arithmetic number, because the mean of its divisors is an integer number (434428800).

Almost surely, 2^7172120169 is an apocalyptic number.

It is an amenable number.

7172120169 is a deficient number, since it is larger than the sum of its proper divisors (3254171031).

7172120169 is a wasteful number, since it uses less digits than its factorization.

7172120169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685 (or 7682 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 7172120169 is about 84688.3709195070. The cubic root of 7172120169 is about 1928.4831674199.

The spelling of 7172120169 in words is "seven billion, one hundred seventy-two million, one hundred twenty thousand, one hundred sixty-nine".