72943109 has 8 divisors (see below), whose sum is σ = 77544480. Its totient is φ = 68418000.

The previous prime is 72943081. The next prime is 72943111. The reversal of 72943109 is 90134927.

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 72943109 - 2¹⁶ = 72877573 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 (72949109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17087 + ... + 20924.

It is an arithmetic number, because the mean of its divisors is an integer number (9693060).

Almost surely, 2^72943109 is an apocalyptic number.

It is an amenable number.

72943109 is a deficient number, since it is larger than the sum of its proper divisors (4601371).

72943109 is a wasteful number, since it uses less digits than its factorization.

72943109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38131.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 72943109 is about 8540.6738024584. The cubic root of 72943109 is about 417.8253221134.

The spelling of 72943109 in words is "seventy-two million, nine hundred forty-three thousand, one hundred nine".