7272819091 has 4 divisors (see below), whose sum is σ = 7293078000. Its totient is φ = 7252560184.

The previous prime is 7272819083. The next prime is 7272819109. The reversal of 7272819091 is 1909182727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7272819091 - 2³ = 7272819083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7272816091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10128916 + ... + 10129633.

It is an arithmetic number, because the mean of its divisors is an integer number (1823269500).

Almost surely, 2^7272819091 is an apocalyptic number.

7272819091 is a deficient number, since it is larger than the sum of its proper divisors (20258909).

7272819091 is a wasteful number, since it uses less digits than its factorization.

7272819091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20258908.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 7272819091 is about 85280.8248728869. The cubic root of 7272819091 is about 1937.4667657483.

It can be divided in two parts, 72728 and 19091, that added together give a palindrome (91819).

The spelling of 7272819091 in words is "seven billion, two hundred seventy-two million, eight hundred nineteen thousand, ninety-one".