79870841 has 4 divisors (see below), whose sum is σ = 81377892. Its totient is φ = 78363792.

The previous prime is 79870799. The next prime is 79870853. The reversal of 79870841 is 14807897.

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 47665216 + 32205625 = 6904^2 + 5675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79870841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79870792 and 79870801.

It is not an unprimeable number, because it can be changed into a prime (79870871) 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, 753446 + ... + 753551.

It is an arithmetic number, because the mean of its divisors is an integer number (20344473).

Almost surely, 2^79870841 is an apocalyptic number.

It is an amenable number.

79870841 is a deficient number, since it is larger than the sum of its proper divisors (1507051).

79870841 is a wasteful number, since it uses less digits than its factorization.

79870841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507050.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 79870841 is about 8937.0487858129. The cubic root of 79870841 is about 430.6549259096.

The spelling of 79870841 in words is "seventy-nine million, eight hundred seventy thousand, eight hundred forty-one".