7727342321 has 4 divisors (see below), whose sum is σ = 7729378032. Its totient is φ = 7725306612.

The previous prime is 7727342309. The next prime is 7727342327. The reversal of 7727342321 is 1232437277.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7727342321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7727342327) 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, 1012151 + ... + 1019756.

It is an arithmetic number, because the mean of its divisors is an integer number (1932344508).

Almost surely, 2^7727342321 is an apocalyptic number.

It is an amenable number.

7727342321 is a deficient number, since it is larger than the sum of its proper divisors (2035711).

7727342321 is a wasteful number, since it uses less digits than its factorization.

7727342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035710.

The product of its digits is 98784, while the sum is 38.

The square root of 7727342321 is about 87905.3031449184. The cubic root of 7727342321 is about 1977.0153925424.

Adding to 7727342321 its reverse (1232437277), we get a palindrome (8959779598).

The spelling of 7727342321 in words is "seven billion, seven hundred twenty-seven million, three hundred forty-two thousand, three hundred twenty-one".