7947139079 has 4 divisors (see below), whose sum is σ = 8669606280. Its totient is φ = 7224671880.

The previous prime is 7947139049. The next prime is 7947139111. The reversal of 7947139079 is 9709317497.

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 7947139079 - 2¹⁶ = 7947073543 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 (7947139049) 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, 361233584 + ... + 361233605.

It is an arithmetic number, because the mean of its divisors is an integer number (2167401570).

Almost surely, 2^7947139079 is an apocalyptic number.

7947139079 is a deficient number, since it is larger than the sum of its proper divisors (722467201).

7947139079 is a wasteful number, since it uses less digits than its factorization.

7947139079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722467200.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The square root of 7947139079 is about 89146.7278087087. The cubic root of 7947139079 is about 1995.5851851254.

The spelling of 7947139079 in words is "seven billion, nine hundred forty-seven million, one hundred thirty-nine thousand, seventy-nine".