879745 has 4 divisors (see below), whose sum is σ = 1055700. Its totient is φ = 703792.

The previous prime is 879743. The next prime is 879797. The reversal of 879745 is 547978.

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 641601 + 238144 = 801^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 879745 - 2¹ = 879743 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

879745 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 879698 and 879707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879743) 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, 87970 + ... + 87979.

It is an arithmetic number, because the mean of its divisors is an integer number (263925).

2⁸⁷⁹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

879745 is a deficient number, since it is larger than the sum of its proper divisors (175955).

879745 is a wasteful number, since it uses less digits than its factorization.

879745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175954.

The product of its digits is 70560, while the sum is 40.

The square root of 879745 is about 937.9472266604. The cubic root of 879745 is about 95.8191400951.

The spelling of 879745 in words is "eight hundred seventy-nine thousand, seven hundred forty-five".