79822849 has 4 divisors (see below), whose sum is σ = 79851780. Its totient is φ = 79793920.

The previous prime is 79822829. The next prime is 79822879. The reversal of 79822849 is 94822897.

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 49956624 + 29866225 = 7068^2 + 5465^2 .

It is a cyclic number.

It is not a de Polignac number, because 79822849 - 2⁵ = 79822817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79822829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9832 + ... + 16009.

It is an arithmetic number, because the mean of its divisors is an integer number (19962945).

It is a Proth number, since it is equal to 609 ⋅ 2¹⁷ + 1 and 609 < 2¹⁷.

Almost surely, 2^79822849 is an apocalyptic number.

It is an amenable number.

79822849 is a deficient number, since it is larger than the sum of its proper divisors (28931).

79822849 is a wasteful number, since it uses less digits than its factorization.

79822849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28930.

The product of its digits is 580608, while the sum is 49.

The square root of 79822849 is about 8934.3633796707. The cubic root of 79822849 is about 430.5686527385.

The spelling of 79822849 in words is "seventy-nine million, eight hundred twenty-two thousand, eight hundred forty-nine".