79791547 has 4 divisors (see below), whose sum is σ = 87045336. Its totient is φ = 72537760.

The previous prime is 79791533. The next prime is 79791559. The reversal of 79791547 is 74519797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74519797 = 11 ⋅6774527.

It is a cyclic number.

It is not a de Polignac number, because 79791547 - 2¹¹ = 79789499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79791547.

It is not an unprimeable number, because it can be changed into a prime (79791247) 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 3 ways as a sum of consecutive naturals, for example, 3626878 + ... + 3626899.

It is an arithmetic number, because the mean of its divisors is an integer number (21761334).

Almost surely, 2^79791547 is an apocalyptic number.

79791547 is a deficient number, since it is larger than the sum of its proper divisors (7253789).

79791547 is a wasteful number, since it uses less digits than its factorization.

79791547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253788.

The product of its digits is 555660, while the sum is 49.

The square root of 79791547 is about 8932.6114322744. The cubic root of 79791547 is about 430.5123638344.

The spelling of 79791547 in words is "seventy-nine million, seven hundred ninety-one thousand, five hundred forty-seven".