872311 has 4 divisors (see below), whose sum is σ = 951624. Its totient is φ = 793000.

The previous prime is 872281. The next prime is 872317. The reversal of 872311 is 113278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 872311 - 2¹³ = 864119 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872317) 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, 39640 + ... + 39661.

It is an arithmetic number, because the mean of its divisors is an integer number (237906).

2⁸⁷²³¹¹ is an apocalyptic number.

872311 is a deficient number, since it is larger than the sum of its proper divisors (79313).

872311 is a wasteful number, since it uses less digits than its factorization.

872311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79312.

The product of its digits is 336, while the sum is 22.

The square root of 872311 is about 933.9759097536. The cubic root of 872311 is about 95.5484800862.

Adding to 872311 its reverse (113278), we get a palindrome (985589).

The spelling of 872311 in words is "eight hundred seventy-two thousand, three hundred eleven".