79089847 has 4 divisors (see below), whose sum is σ = 82528560. Its totient is φ = 75651136.

The previous prime is 79089841. The next prime is 79089859. The reversal of 79089847 is 74898097.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79089847 - 2³ = 79089839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79089794 and 79089803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79089841) 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, 1719322 + ... + 1719367.

It is an arithmetic number, because the mean of its divisors is an integer number (20632140).

Almost surely, 2^79089847 is an apocalyptic number.

79089847 is a deficient number, since it is larger than the sum of its proper divisors (3438713).

79089847 is a wasteful number, since it uses less digits than its factorization.

79089847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438712.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 79089847 is about 8893.2472696985. The cubic root of 79089847 is about 429.2466473783.

The spelling of 79089847 in words is "seventy-nine million, eighty-nine thousand, eight hundred forty-seven".