7283797721 has 8 divisors (see below), whose sum is σ = 7374442944. Its totient is φ = 7193710800.

The previous prime is 7283797681. The next prime is 7283797753. The reversal of 7283797721 is 1277973827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7283797721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7283797121) 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 7 ways as a sum of consecutive naturals, for example, 113291 + ... + 165536.

It is an arithmetic number, because the mean of its divisors is an integer number (921805368).

Almost surely, 2^7283797721 is an apocalyptic number.

It is an amenable number.

7283797721 is a deficient number, since it is larger than the sum of its proper divisors (90645223).

7283797721 is a wasteful number, since it uses less digits than its factorization.

7283797721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279151.

The product of its digits is 2074464, while the sum is 53.

The square root of 7283797721 is about 85345.1681174746. The cubic root of 7283797721 is about 1938.4411717952.

The spelling of 7283797721 in words is "seven billion, two hundred eighty-three million, seven hundred ninety-seven thousand, seven hundred twenty-one".