7979821442 has 8 divisors (see below), whose sum is σ = 12121248000. Its totient is φ = 3939405444.

The previous prime is 7979821427. The next prime is 7979821523. The reversal of 7979821442 is 2441289797.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25252442 + ... + 25252757.

It is an arithmetic number, because the mean of its divisors is an integer number (1515156000).

Almost surely, 2^7979821442 is an apocalyptic number.

7979821442 is a deficient number, since it is larger than the sum of its proper divisors (4141426558).

7979821442 is a wasteful number, since it uses less digits than its factorization.

7979821442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50505280.

The product of its digits is 2032128, while the sum is 53.

The square root of 7979821442 is about 89329.8463112973. The cubic root of 7979821442 is about 1998.3170377162.

The spelling of 7979821442 in words is "seven billion, nine hundred seventy-nine million, eight hundred twenty-one thousand, four hundred forty-two".