79800145 has 8 divisors (see below), whose sum is σ = 98096040. Its totient is φ = 62282880.

The previous prime is 79800143. The next prime is 79800151. The reversal of 79800145 is 54100897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4613904 + 75186241 = 2148^2 + 8671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79800145 - 2¹ = 79800143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79800145.

It is not an unprimeable number, because it can be changed into a prime (79800143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194430 + ... + 194839.

It is an arithmetic number, because the mean of its divisors is an integer number (12262005).

Almost surely, 2^79800145 is an apocalyptic number.

It is an amenable number.

79800145 is a deficient number, since it is larger than the sum of its proper divisors (18295895).

79800145 is a wasteful number, since it uses less digits than its factorization.

79800145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389315.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 79800145 is about 8933.0926895449. The cubic root of 79800145 is about 430.5278266769.

The spelling of 79800145 in words is "seventy-nine million, eight hundred thousand, one hundred forty-five".