813788345 has 4 divisors (see below), whose sum is σ = 976546020. Its totient is φ = 651030672.

The previous prime is 813788333. The next prime is 813788363. The reversal of 813788345 is 543887318.

It is a happy number.

813788345 is digitally balanced in base 6, 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 132526144 + 681262201 = 11512^2 + 26101^2 .

It is a cyclic number.

It is not a de Polignac number, because 813788345 - 2⁴ = 813788329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 813788345.

It is an unprimeable number.

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, 81378830 + ... + 81378839.

It is an arithmetic number, because the mean of its divisors is an integer number (244136505).

Almost surely, 2^813788345 is an apocalyptic number.

It is an amenable number.

813788345 is a deficient number, since it is larger than the sum of its proper divisors (162757675).

813788345 is a wasteful number, since it uses less digits than its factorization.

813788345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162757674.

The product of its digits is 645120, while the sum is 47.

The square root of 813788345 is about 28526.9757422689. The cubic root of 813788345 is about 933.6207351164.

The spelling of 813788345 in words is "eight hundred thirteen million, seven hundred eighty-eight thousand, three hundred forty-five".