79280147 has 4 divisors (see below), whose sum is σ = 79325736. Its totient is φ = 79234560.

The previous prime is 79280143. The next prime is 79280153. The reversal of 79280147 is 74108297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74108297 = 827 ⋅89611.

It is a cyclic number.

It is not a de Polignac number, because 79280147 - 2² = 79280143 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 79280147.

It is not an unprimeable number, because it can be changed into a prime (79280143) 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, 20078 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (19831434).

Almost surely, 2^79280147 is an apocalyptic number.

79280147 is a deficient number, since it is larger than the sum of its proper divisors (45589).

79280147 is a wasteful number, since it uses less digits than its factorization.

79280147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45588.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 79280147 is about 8903.9399705973. The cubic root of 79280147 is about 429.5906452165.

The spelling of 79280147 in words is "seventy-nine million, two hundred eighty thousand, one hundred forty-seven".