330728831 has 2 divisors, whose sum is σ = 330728832. Its totient is φ = 330728830.

The previous prime is 330728819. The next prime is 330728833. The reversal of 330728831 is 138827033.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-330728831 is a prime.

It is a super-2 number, since 2×330728831² = 218763119309253122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 330728833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 330728791 and 330728800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330728833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165364415 + 165364416.

It is an arithmetic number, because the mean of its divisors is an integer number (165364416).

Almost surely, 2^330728831 is an apocalyptic number.

330728831 is a deficient number, since it is larger than the sum of its proper divisors (1).

330728831 is an equidigital number, since it uses as much as digits as its factorization.

330728831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 330728831 is about 18185.9514735963. The cubic root of 330728831 is about 691.5506894009.

The spelling of 330728831 in words is "three hundred thirty million, seven hundred twenty-eight thousand, eight hundred thirty-one".