79785445 has 4 divisors (see below), whose sum is σ = 95742540. Its totient is φ = 63828352.

The previous prime is 79785443. The next prime is 79785449. The reversal of 79785445 is 54458797.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 18335524 = 7839^2 + 4282^2 .

It is a cyclic number.

It is not a de Polignac number, because 79785445 - 2¹ = 79785443 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79785443) 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, 7978540 + ... + 7978549.

It is an arithmetic number, because the mean of its divisors is an integer number (23935635).

Almost surely, 2^79785445 is an apocalyptic number.

It is an amenable number.

79785445 is a deficient number, since it is larger than the sum of its proper divisors (15957095).

79785445 is a wasteful number, since it uses less digits than its factorization.

79785445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15957094.

The product of its digits is 1411200, while the sum is 49.

The square root of 79785445 is about 8932.2698682922. The cubic root of 79785445 is about 430.5013891823.

The spelling of 79785445 in words is "seventy-nine million, seven hundred eighty-five thousand, four hundred forty-five".