8172369 has 6 divisors (see below), whose sum is σ = 11804546. Its totient is φ = 5448240.

The previous prime is 8172349. The next prime is 8172371. The reversal of 8172369 is 9632718.

It can be written as a sum of positive squares in only one way, i.e., 5349969 + 2822400 = 2313^2 + 1680^2 .

It is not a de Polignac number, because 8172369 - 2²⁰ = 7123793 is a prime.

It is a super-2 number, since 2×8172369² = 133575230144322, which contains 22 as substring.

It is a Duffinian number.

8172369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8172319) 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, 454012 + ... + 454029.

Almost surely, 2^8172369 is an apocalyptic number.

It is an amenable number.

8172369 is a deficient number, since it is larger than the sum of its proper divisors (3632177).

8172369 is a wasteful number, since it uses less digits than its factorization.

8172369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908047 (or 908044 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 8172369 is about 2858.7355596487. The cubic root of 8172369 is about 201.4262137300.

The spelling of 8172369 in words is "eight million, one hundred seventy-two thousand, three hundred sixty-nine".