7109728409 has 8 divisors (see below), whose sum is σ = 8126011008. Its totient is φ = 6093597600.

The previous prime is 7109728343. The next prime is 7109728411. The reversal of 7109728409 is 9048279017.

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 7109728409 - 2¹² = 7109724313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7109728469) 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, 92189 + ... + 150725.

It is an arithmetic number, because the mean of its divisors is an integer number (1015751376).

Almost surely, 2^7109728409 is an apocalyptic number.

It is an amenable number.

7109728409 is a deficient number, since it is larger than the sum of its proper divisors (1016282599).

7109728409 is a wasteful number, since it uses less digits than its factorization.

7109728409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75895.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 7109728409 is about 84319.2054575943. The cubic root of 7109728409 is about 1922.8747814020.

The spelling of 7109728409 in words is "seven billion, one hundred nine million, seven hundred twenty-eight thousand, four hundred nine".