79087789 has 16 divisors (see below), whose sum is σ = 90593280. Its totient is φ = 68382000.

The previous prime is 79087787. The next prime is 79087807. The reversal of 79087789 is 98778097.

It is a cyclic number.

It is not a de Polignac number, because 79087789 - 2¹ = 79087787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79087783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18154 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (5662080).

Almost surely, 2^79087789 is an apocalyptic number.

It is an amenable number.

79087789 is a deficient number, since it is larger than the sum of its proper divisors (11505491).

79087789 is a wasteful number, since it uses less digits than its factorization.

79087789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 79087789 is about 8893.1315631784. The cubic root of 79087789 is about 429.2429241981.

The spelling of 79087789 in words is "seventy-nine million, eighty-seven thousand, seven hundred eighty-nine".