79930447 has 4 divisors (see below), whose sum is σ = 84632256. Its totient is φ = 75228640.

The previous prime is 79930393. The next prime is 79930453. The reversal of 79930447 is 74403997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74403997 = 53 ⋅1403849.

It is a cyclic number.

It is not a de Polignac number, because 79930447 - 2²³ = 71541839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79930457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350879 + ... + 2350912.

It is an arithmetic number, because the mean of its divisors is an integer number (21158064).

Almost surely, 2^79930447 is an apocalyptic number.

79930447 is a deficient number, since it is larger than the sum of its proper divisors (4701809).

79930447 is a wasteful number, since it uses less digits than its factorization.

79930447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701808.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 79930447 is about 8940.3829336332. The cubic root of 79930447 is about 430.7620289702.

The spelling of 79930447 in words is "seventy-nine million, nine hundred thirty thousand, four hundred forty-seven".