79911447 has 16 divisors (see below), whose sum is σ = 132840192. Its totient is φ = 41512320.

The previous prime is 79911431. The next prime is 79911451. The reversal of 79911447 is 74411997.

It is not a de Polignac number, because 79911447 - 2⁴ = 79911431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79911399 and 79911408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79911427) 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 15 ways as a sum of consecutive naturals, for example, 172738 + ... + 173199.

It is an arithmetic number, because the mean of its divisors is an integer number (8302512).

Almost surely, 2^79911447 is an apocalyptic number.

79911447 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

79911447 is a deficient number, since it is larger than the sum of its proper divisors (52928745).

79911447 is a wasteful number, since it uses less digits than its factorization.

79911447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345958.

The product of its digits is 63504, while the sum is 42.

The square root of 79911447 is about 8939.3202761731. The cubic root of 79911447 is about 430.7278945970.

It can be divided in two parts, 799 and 11447, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 79911447 in words is "seventy-nine million, nine hundred eleven thousand, four hundred forty-seven".