7978752219 has 4 divisors (see below), whose sum is σ = 10638336296. Its totient is φ = 5319168144.

The previous prime is 7978752209. The next prime is 7978752253. The reversal of 7978752219 is 9122578797.

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

It is not a de Polignac number, because 7978752219 - 2¹² = 7978748123 is a prime.

It is a super-2 number, since 2×7978752219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7978752209) 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, 1329792034 + ... + 1329792039.

It is an arithmetic number, because the mean of its divisors is an integer number (2659584074).

Almost surely, 2^7978752219 is an apocalyptic number.

7978752219 is a deficient number, since it is larger than the sum of its proper divisors (2659584077).

7978752219 is a wasteful number, since it uses less digits than its factorization.

7978752219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659584076.

The product of its digits is 4445280, while the sum is 57.

The square root of 7978752219 is about 89323.8614201155. The cubic root of 7978752219 is about 1998.2277816683.

The spelling of 7978752219 in words is "seven billion, nine hundred seventy-eight million, seven hundred fifty-two thousand, two hundred nineteen".