79440811 has 4 divisors (see below), whose sum is σ = 79736400. Its totient is φ = 79145224.

The previous prime is 79440791. The next prime is 79440833. The reversal of 79440811 is 11804497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11804497 = 23 ⋅513239.

It is a cyclic number.

It is not a de Polignac number, because 79440811 - 2¹¹ = 79438763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79440611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147391 + ... + 147928.

It is an arithmetic number, because the mean of its divisors is an integer number (19934100).

Almost surely, 2^79440811 is an apocalyptic number.

79440811 is a deficient number, since it is larger than the sum of its proper divisors (295589).

79440811 is a wasteful number, since it uses less digits than its factorization.

79440811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295588.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 79440811 is about 8912.9574777399. The cubic root of 79440811 is about 429.8806429137.

The spelling of 79440811 in words is "seventy-nine million, four hundred forty thousand, eight hundred eleven".