79948779 has 4 divisors (see below), whose sum is σ = 106598376. Its totient is φ = 53299184.

The previous prime is 79948777. The next prime is 79948787. The reversal of 79948779 is 97784997.

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 79948779 - 2¹ = 79948777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79948777) 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, 13324794 + ... + 13324799.

It is an arithmetic number, because the mean of its divisors is an integer number (26649594).

Almost surely, 2^79948779 is an apocalyptic number.

79948779 is a deficient number, since it is larger than the sum of its proper divisors (26649597).

79948779 is a wasteful number, since it uses less digits than its factorization.

79948779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26649596.

The product of its digits is 8001504, while the sum is 60.

The square root of 79948779 is about 8941.4081105830. The cubic root of 79948779 is about 430.7949581238.

The spelling of 79948779 in words is "seventy-nine million, nine hundred forty-eight thousand, seven hundred seventy-nine".