813319652 has 12 divisors (see below), whose sum is σ = 1485192576. Its totient is φ = 388978920.

The previous prime is 813319651. The next prime is 813319667. The reversal of 813319652 is 256913318.

It is a happy number.

It is a super-2 number, since 2×813319652² = 1322977712658802208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813319651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4420124 + ... + 4420307.

It is an arithmetic number, because the mean of its divisors is an integer number (123766048).

Almost surely, 2^813319652 is an apocalyptic number.

It is an amenable number.

813319652 is a deficient number, since it is larger than the sum of its proper divisors (671872924).

813319652 is a wasteful number, since it uses less digits than its factorization.

813319652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8840458 (or 8840456 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 813319652 is about 28518.7596504476. The cubic root of 813319652 is about 933.4414642861.

The spelling of 813319652 in words is "eight hundred thirteen million, three hundred nineteen thousand, six hundred fifty-two".