79785089 has 4 divisors (see below), whose sum is σ = 79825200. Its totient is φ = 79744980.

The previous prime is 79785071. The next prime is 79785107. The reversal of 79785089 is 98058797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (79785071) and next prime (79785107).

It is a cyclic number.

It is not a de Polignac number, because 79785089 - 2⁸ = 79784833 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 79785089.

It is not an unprimeable number, because it can be changed into a prime (79785019) 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, 16907 + ... + 21104.

It is an arithmetic number, because the mean of its divisors is an integer number (19956300).

Almost surely, 2^79785089 is an apocalyptic number.

It is an amenable number.

79785089 is a deficient number, since it is larger than the sum of its proper divisors (40111).

79785089 is a wasteful number, since it uses less digits than its factorization.

79785089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40110.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 79785089 is about 8932.2499405245. The cubic root of 79785089 is about 430.5007488871.

The spelling of 79785089 in words is "seventy-nine million, seven hundred eighty-five thousand, eighty-nine".