7313263721 has 4 divisors (see below), whose sum is σ = 7313458944. Its totient is φ = 7313068500.

The previous prime is 7313263693. The next prime is 7313263739. The reversal of 7313263721 is 1273623137.

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 not a de Polignac number, because 7313263721 - 2²⁶ = 7246154857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7313263021) 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, 21785 + ... + 122886.

It is an arithmetic number, because the mean of its divisors is an integer number (1828364736).

Almost surely, 2^7313263721 is an apocalyptic number.

It is an amenable number.

7313263721 is a deficient number, since it is larger than the sum of its proper divisors (195223).

7313263721 is a wasteful number, since it uses less digits than its factorization.

7313263721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195222.

The product of its digits is 31752, while the sum is 35.

The square root of 7313263721 is about 85517.6222833633. The cubic root of 7313263721 is about 1941.0515892451.

Adding to 7313263721 its reverse (1273623137), we get a palindrome (8586886858).

The spelling of 7313263721 in words is "seven billion, three hundred thirteen million, two hundred sixty-three thousand, seven hundred twenty-one".