4173509 has 4 divisors (see below), whose sum is σ = 4178016. Its totient is φ = 4169004.

The previous prime is 4173493. The next prime is 4173523. The reversal of 4173509 is 9053714.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9053714 = 2 ⋅4526857.

It is a cyclic number.

It is not a de Polignac number, because 4173509 - 2⁴ = 4173493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4173539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (1044504).

Almost surely, 2^4173509 is an apocalyptic number.

It is an amenable number.

4173509 is a deficient number, since it is larger than the sum of its proper divisors (4507).

4173509 is a wasteful number, since it uses less digits than its factorization.

4173509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 4173509 is about 2042.9167873411. The cubic root of 4173509 is about 161.0029319323.

The spelling of 4173509 in words is "four million, one hundred seventy-three thousand, five hundred nine".