813968239 has 8 divisors (see below), whose sum is σ = 932843520. Its totient is φ = 695741496.

The previous prime is 813968237. The next prime is 813968249. The reversal of 813968239 is 932869318.

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 813968239 - 2¹ = 813968237 is a prime.

It is a super-2 number, since 2×813968239² = 1325088588201522242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813968192 and 813968201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813968237) 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, 159439 + ... + 164464.

It is an arithmetic number, because the mean of its divisors is an integer number (116605440).

Almost surely, 2^813968239 is an apocalyptic number.

813968239 is a deficient number, since it is larger than the sum of its proper divisors (118875281).

813968239 is a wasteful number, since it uses less digits than its factorization.

813968239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324269.

The product of its digits is 559872, while the sum is 49.

The square root of 813968239 is about 28530.1286187076. The cubic root of 813968239 is about 933.6895246632.

The spelling of 813968239 in words is "eight hundred thirteen million, nine hundred sixty-eight thousand, two hundred thirty-nine".