8729418109 has 4 divisors (see below), whose sum is σ = 8729661600. Its totient is φ = 8729174620.

The previous prime is 8729418067. The next prime is 8729418119. The reversal of 8729418109 is 9018149278.

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 an emirpimes, since its reverse is a distinct semiprime: 9018149278 = 2 ⋅4509074639.

It is a cyclic number.

It is not a de Polignac number, because 8729418109 - 2⁹ = 8729417597 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8729418119) 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, 56209 + ... + 143590.

It is an arithmetic number, because the mean of its divisors is an integer number (2182415400).

Almost surely, 2^8729418109 is an apocalyptic number.

It is an amenable number.

8729418109 is a deficient number, since it is larger than the sum of its proper divisors (243491).

8729418109 is a wasteful number, since it uses less digits than its factorization.

8729418109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243490.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 8729418109 is about 93431.3550634903. The cubic root of 8729418109 is about 2059.0256891448.

The spelling of 8729418109 in words is "eight billion, seven hundred twenty-nine million, four hundred eighteen thousand, one hundred nine".