823140311 has 4 divisors (see below), whose sum is σ = 940731792. Its totient is φ = 705548832.

The previous prime is 823140301. The next prime is 823140341. The reversal of 823140311 is 113041328.

823140311 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 is a cyclic number.

It is not a de Polignac number, because 823140311 - 2⁶ = 823140247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823140301) 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, 58795730 + ... + 58795743.

It is an arithmetic number, because the mean of its divisors is an integer number (235182948).

Almost surely, 2^823140311 is an apocalyptic number.

823140311 is a deficient number, since it is larger than the sum of its proper divisors (117591481).

823140311 is a wasteful number, since it uses less digits than its factorization.

823140311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117591480.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 823140311 is about 28690.4219383403. The cubic root of 823140311 is about 937.1834777629.

Adding to 823140311 its reverse (113041328), we get a palindrome (936181639).

The spelling of 823140311 in words is "eight hundred twenty-three million, one hundred forty thousand, three hundred eleven".