79810873 has 4 divisors (see below), whose sum is σ = 79833060. Its totient is φ = 79788688.

The previous prime is 79810867. The next prime is 79810877. The reversal of 79810873 is 37801897.

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 5368489 + 74442384 = 2317^2 + 8628^2 .

It is a cyclic number.

It is not a de Polignac number, because 79810873 - 2⁹ = 79810361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79810877) 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, 4318 + ... + 13351.

It is an arithmetic number, because the mean of its divisors is an integer number (19958265).

Almost surely, 2^79810873 is an apocalyptic number.

It is an amenable number.

79810873 is a deficient number, since it is larger than the sum of its proper divisors (22187).

79810873 is a wasteful number, since it uses less digits than its factorization.

79810873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22186.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 79810873 is about 8933.6931333016. The cubic root of 79810873 is about 430.5471186032.

The spelling of 79810873 in words is "seventy-nine million, eight hundred ten thousand, eight hundred seventy-three".