7923880247 has 4 divisors (see below), whose sum is σ = 7924816320. Its totient is φ = 7922944176.

The previous prime is 7923880229. The next prime is 7923880249. The reversal of 7923880247 is 7420883297.

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-7923880247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7923880195 and 7923880204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7923880249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455222 + ... + 472307.

It is an arithmetic number, because the mean of its divisors is an integer number (1981204080).

Almost surely, 2^7923880247 is an apocalyptic number.

7923880247 is a deficient number, since it is larger than the sum of its proper divisors (936073).

7923880247 is an equidigital number, since it uses as much as digits as its factorization.

7923880247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936072.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 7923880247 is about 89016.1796922335. The cubic root of 7923880247 is about 1993.6364614124.

The spelling of 7923880247 in words is "seven billion, nine hundred twenty-three million, eight hundred eighty thousand, two hundred forty-seven".