813389012 has 24 divisors (see below), whose sum is σ = 1499282400. Its totient is φ = 385049376.

The previous prime is 813388999. The next prime is 813389023. The reversal of 813389012 is 210983318.

813389012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×813389012² = 1323203369684672288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201914 + ... + 205902.

It is an arithmetic number, because the mean of its divisors is an integer number (62470100).

Almost surely, 2^813389012 is an apocalyptic number.

It is an amenable number.

813389012 is a deficient number, since it is larger than the sum of its proper divisors (685893388).

813389012 is a wasteful number, since it uses less digits than its factorization.

813389012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6695 (or 6693 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 813389012 is about 28519.9756661888. The cubic root of 813389012 is about 933.4679981995.

The spelling of 813389012 in words is "eight hundred thirteen million, three hundred eighty-nine thousand, twelve".