329975813 has 4 divisors (see below), whose sum is σ = 330017100. Its totient is φ = 329934528.

The previous prime is 329975791. The next prime is 329975819. The reversal of 329975813 is 318579923.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 276290884 = 7327^2 + 16622^2 .

It is a cyclic number.

It is not a de Polignac number, because 329975813 - 2⁸ = 329975557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329975819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4388 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (82504275).

Almost surely, 2^329975813 is an apocalyptic number.

It is an amenable number.

329975813 is a deficient number, since it is larger than the sum of its proper divisors (41287).

329975813 is a wasteful number, since it uses less digits than its factorization.

329975813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41286.

The product of its digits is 408240, while the sum is 47.

The square root of 329975813 is about 18165.2363871214. The cubic root of 329975813 is about 691.0254395172.

The spelling of 329975813 in words is "three hundred twenty-nine million, nine hundred seventy-five thousand, eight hundred thirteen".