7921279933 has 8 divisors (see below), whose sum is σ = 9180397440. Its totient is φ = 6694038960.

The previous prime is 7921279889. The next prime is 7921279963. The reversal of 7921279933 is 3399721297.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-7921279933 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 (7921279963) 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 7 ways as a sum of consecutive naturals, for example, 7968598 + ... + 7969591.

It is an arithmetic number, because the mean of its divisors is an integer number (1147549680).

Almost surely, 2^7921279933 is an apocalyptic number.

It is an amenable number.

7921279933 is a deficient number, since it is larger than the sum of its proper divisors (1259117507).

7921279933 is a wasteful number, since it uses less digits than its factorization.

7921279933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15938267.

The product of its digits is 1285956, while the sum is 52.

The square root of 7921279933 is about 89001.5726434089. The cubic root of 7921279933 is about 1993.4183591773.

The spelling of 7921279933 in words is "seven billion, nine hundred twenty-one million, two hundred seventy-nine thousand, nine hundred thirty-three".