813385969 has 8 divisors (see below), whose sum is σ = 892461312. Its totient is φ = 735165840.

The previous prime is 813385957. The next prime is 813385981. The reversal of 813385969 is 969583318.

813385969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (813385957) and next prime (813385981).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 813385969 - 2⁷ = 813385841 is a prime.

It is a super-2 number, since 2×813385969² = 1323193469132137922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813385999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211809 + ... + 215614.

It is an arithmetic number, because the mean of its divisors is an integer number (111557664).

Almost surely, 2^813385969 is an apocalyptic number.

It is an amenable number.

813385969 is a deficient number, since it is larger than the sum of its proper divisors (79075343).

813385969 is a wasteful number, since it uses less digits than its factorization.

813385969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427607.

The product of its digits is 1399680, while the sum is 52.

The square root of 813385969 is about 28519.9223175660. The cubic root of 813385969 is about 933.4668341207.

The spelling of 813385969 in words is "eight hundred thirteen million, three hundred eighty-five thousand, nine hundred sixty-nine".