7172397 has 6 divisors (see below), whose sum is σ = 10360142. Its totient is φ = 4781592.

The previous prime is 7172387. The next prime is 7172411. The reversal of 7172397 is 7932717.

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 715716 = 2541^2 + 846^2 .

It is not a de Polignac number, because 7172397 - 2¹⁶ = 7106861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7172327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398458 + ... + 398475.

Almost surely, 2^7172397 is an apocalyptic number.

It is an amenable number.

7172397 is a deficient number, since it is larger than the sum of its proper divisors (3187745).

7172397 is a wasteful number, since it uses less digits than its factorization.

7172397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796939 (or 796936 counting only the distinct ones).

The product of its digits is 18522, while the sum is 36.

The square root of 7172397 is about 2678.1331184241. The cubic root of 7172397 is about 192.8507979100.

It can be divided in two parts, 7172 and 397, that added together give a square (7569 = 87²).

The spelling of 7172397 in words is "seven million, one hundred seventy-two thousand, three hundred ninety-seven".