7272909909 has 24 divisors (see below), whose sum is σ = 10620734904. Its totient is φ = 4795440000.

The previous prime is 7272909887. The next prime is 7272909923. The reversal of 7272909909 is 9099092727.

It can be written as a sum of positive squares in 4 ways, for example, as 1958062500 + 5314847409 = 44250^2 + 72903^2 .

It is not a de Polignac number, because 7272909909 - 2²⁷ = 7138692181 is a prime.

7272909909 is a modest number, since divided by 909909 gives 7272 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272909949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 960679 + ... + 968219.

It is an arithmetic number, because the mean of its divisors is an integer number (442530621).

Almost surely, 2^7272909909 is an apocalyptic number.

It is an amenable number.

7272909909 is a deficient number, since it is larger than the sum of its proper divisors (3347824995).

7272909909 is a wasteful number, since it uses less digits than its factorization.

7272909909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8709 (or 8706 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 7272909909 is about 85281.3573355865. The cubic root of 7272909909 is about 1937.4748303022.

The spelling of 7272909909 in words is "seven billion, two hundred seventy-two million, nine hundred nine thousand, nine hundred nine".