79830505 has 4 divisors (see below), whose sum is σ = 95796612. Its totient is φ = 63864400.

The previous prime is 79830503. The next prime is 79830511. The reversal of 79830505 is 50503897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 64432729 = 3924^2 + 8027^2 .

It is not a de Polignac number, because 79830505 - 2¹ = 79830503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79830503) 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, 7983046 + ... + 7983055.

It is an arithmetic number, because the mean of its divisors is an integer number (23949153).

Almost surely, 2^79830505 is an apocalyptic number.

It is an amenable number.

79830505 is a deficient number, since it is larger than the sum of its proper divisors (15966107).

79830505 is a wasteful number, since it uses less digits than its factorization.

79830505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966106.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 79830505 is about 8934.7918274574. The cubic root of 79830505 is about 430.5824179209.

It can be divided in two parts, 79 and 830505, that added together give a cube (830584 = 94³).

The spelling of 79830505 in words is "seventy-nine million, eight hundred thirty thousand, five hundred five".