827861 has 4 divisors (see below), whose sum is σ = 833292. Its totient is φ = 822432.

The previous prime is 827857. The next prime is 827867. The reversal of 827861 is 168728.

827861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 323761 + 504100 = 569^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 827861 - 2² = 827857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827867) 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, 2480 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (208323).

2⁸²⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

827861 is a deficient number, since it is larger than the sum of its proper divisors (5431).

827861 is a wasteful number, since it uses less digits than its factorization.

827861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430.

The product of its digits is 5376, while the sum is 32.

The square root of 827861 is about 909.8686718423. The cubic root of 827861 is about 93.8971638320.

The spelling of 827861 in words is "eight hundred twenty-seven thousand, eight hundred sixty-one".