813824841 has 4 divisors (see below), whose sum is σ = 1085099792. Its totient is φ = 542549892.

The previous prime is 813824839. The next prime is 813824849. The reversal of 813824841 is 148428318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 813824841 - 2¹ = 813824839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 813824841.

It is not an unprimeable number, because it can be changed into a prime (813824849) 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, 135637471 + ... + 135637476.

It is an arithmetic number, because the mean of its divisors is an integer number (271274948).

Almost surely, 2^813824841 is an apocalyptic number.

It is an amenable number.

813824841 is a deficient number, since it is larger than the sum of its proper divisors (271274951).

813824841 is a wasteful number, since it uses less digits than its factorization.

813824841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271274950.

The product of its digits is 49152, while the sum is 39.

The square root of 813824841 is about 28527.6154103353. The cubic root of 813824841 is about 933.6346916172.

The spelling of 813824841 in words is "eight hundred thirteen million, eight hundred twenty-four thousand, eight hundred forty-one".