7921845371 has 4 divisors (see below), whose sum is σ = 8642013144. Its totient is φ = 7201677600.

The previous prime is 7921845367. The next prime is 7921845439. The reversal of 7921845371 is 1735481297.

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 7921845371 - 2² = 7921845367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7921845331) 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, 360083870 + ... + 360083891.

It is an arithmetic number, because the mean of its divisors is an integer number (2160503286).

Almost surely, 2^7921845371 is an apocalyptic number.

7921845371 is a deficient number, since it is larger than the sum of its proper divisors (720167773).

7921845371 is a wasteful number, since it uses less digits than its factorization.

7921845371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720167772.

The product of its digits is 423360, while the sum is 47.

The square root of 7921845371 is about 89004.7491485707. The cubic root of 7921845371 is about 1993.4657895455.

The spelling of 7921845371 in words is "seven billion, nine hundred twenty-one million, eight hundred forty-five thousand, three hundred seventy-one".