79843869 has 24 divisors (see below), whose sum is σ = 132612480. Its totient is φ = 45345888.

The previous prime is 79843859. The next prime is 79843889. The reversal of 79843869 is 96834897.

It is not a de Polignac number, because 79843869 - 2⁵ = 79843837 is a prime.

It is a super-2 number, since 2×79843869² = 12750086833778322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79843859) 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 in 23 ways as a sum of consecutive naturals, for example, 6727 + ... + 14315.

It is an arithmetic number, because the mean of its divisors is an integer number (5525520).

Almost surely, 2^79843869 is an apocalyptic number.

It is an amenable number.

79843869 is a deficient number, since it is larger than the sum of its proper divisors (52768611).

79843869 is a wasteful number, since it uses less digits than its factorization.

79843869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769 (or 7766 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 79843869 is about 8935.5396591364. The cubic root of 79843869 is about 430.6064437506.

The spelling of 79843869 in words is "seventy-nine million, eight hundred forty-three thousand, eight hundred sixty-nine".