813396389 has 8 divisors (see below), whose sum is σ = 877416960. Its totient is φ = 749583216.

The previous prime is 813396359. The next prime is 813396427. The reversal of 813396389 is 983693318.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813396389 is a prime.

It is a super-3 number, since 3×813396389³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813396319) 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, 43649 + ... + 59430.

It is an arithmetic number, because the mean of its divisors is an integer number (109677120).

Almost surely, 2^813396389 is an apocalyptic number.

It is an amenable number.

813396389 is a deficient number, since it is larger than the sum of its proper divisors (64020571).

813396389 is a wasteful number, since it uses less digits than its factorization.

813396389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103699.

The product of its digits is 839808, while the sum is 50.

The square root of 813396389 is about 28520.1049963004. The cubic root of 813396389 is about 933.4708202082.

The spelling of 813396389 in words is "eight hundred thirteen million, three hundred ninety-six thousand, three hundred eighty-nine".