7921344311 has 4 divisors (see below), whose sum is σ = 7935266400. Its totient is φ = 7907422224.

The previous prime is 7921344281. The next prime is 7921344313. The reversal of 7921344311 is 1134431297.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7921344311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921344313) 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, 6960191 + ... + 6961328.

It is an arithmetic number, because the mean of its divisors is an integer number (1983816600).

Almost surely, 2^7921344311 is an apocalyptic number.

7921344311 is a deficient number, since it is larger than the sum of its proper divisors (13922089).

7921344311 is a wasteful number, since it uses less digits than its factorization.

7921344311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13922088.

The product of its digits is 18144, while the sum is 35.

The square root of 7921344311 is about 89001.9343104407. The cubic root of 7921344311 is about 1993.4237594805.

The spelling of 7921344311 in words is "seven billion, nine hundred twenty-one million, three hundred forty-four thousand, three hundred eleven".