8172739 has 8 divisors (see below), whose sum is σ = 8432640. Its totient is φ = 7917000.

The previous prime is 8172713. The next prime is 8172821. The reversal of 8172739 is 9372718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8172739 - 2⁵ = 8172707 is a prime.

It is a Duffinian number.

8172739 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8172698 and 8172707.

It is not an unprimeable number, because it can be changed into a prime (8172139) 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 7 ways as a sum of consecutive naturals, for example, 3214 + ... + 5164.

It is an arithmetic number, because the mean of its divisors is an integer number (1054080).

Almost surely, 2^8172739 is an apocalyptic number.

8172739 is a deficient number, since it is larger than the sum of its proper divisors (259901).

8172739 is a wasteful number, since it uses less digits than its factorization.

8172739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081.

The product of its digits is 21168, while the sum is 37.

The square root of 8172739 is about 2858.8002728417. The cubic root of 8172739 is about 201.4292535085.

It can be divided in two parts, 8172 and 739, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 8172739 in words is "eight million, one hundred seventy-two thousand, seven hundred thirty-nine".