79865158 has 4 divisors (see below), whose sum is σ = 119797740. Its totient is φ = 39932578.

The previous prime is 79865153. The next prime is 79865161. The reversal of 79865158 is 85156897.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79865153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19966288 + ... + 19966291.

It is an arithmetic number, because the mean of its divisors is an integer number (29949435).

Almost surely, 2^79865158 is an apocalyptic number.

79865158 is a deficient number, since it is larger than the sum of its proper divisors (39932582).

79865158 is a wasteful number, since it uses less digits than its factorization.

79865158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39932581.

The product of its digits is 604800, while the sum is 49.

The square root of 79865158 is about 8936.7308340355. The cubic root of 79865158 is about 430.6447116271.

It can be divided in two parts, 798 and 65158, that added together give a palindrome (65956).

The spelling of 79865158 in words is "seventy-nine million, eight hundred sixty-five thousand, one hundred fifty-eight".