813776413 has 4 divisors (see below), whose sum is σ = 813905280. Its totient is φ = 813647548.

The previous prime is 813776407. The next prime is 813776449. The reversal of 813776413 is 314677318.

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 a cyclic number.

It is not a de Polignac number, because 813776413 - 2⁹ = 813775901 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.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813776713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54445 + ... + 67762.

It is an arithmetic number, because the mean of its divisors is an integer number (203476320).

Almost surely, 2^813776413 is an apocalyptic number.

It is an amenable number.

813776413 is a deficient number, since it is larger than the sum of its proper divisors (128867).

813776413 is a wasteful number, since it uses less digits than its factorization.

813776413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128866.

The product of its digits is 84672, while the sum is 40.

The square root of 813776413 is about 28526.7666061192. The cubic root of 813776413 is about 933.6161720884.

The spelling of 813776413 in words is "eight hundred thirteen million, seven hundred seventy-six thousand, four hundred thirteen".