330681991 has 8 divisors (see below), whose sum is σ = 341973504. Its totient is φ = 319429560.

The previous prime is 330681941. The next prime is 330682007. The reversal of 330681991 is 199186033.

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 330681991 - 2⁹ = 330681479 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 (330681931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 26926.

It is an arithmetic number, because the mean of its divisors is an integer number (42746688).

Almost surely, 2^330681991 is an apocalyptic number.

330681991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

330681991 is a deficient number, since it is larger than the sum of its proper divisors (11291513).

330681991 is a wasteful number, since it uses less digits than its factorization.

330681991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19541.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 330681991 is about 18184.6636207547. The cubic root of 330681991 is about 691.5180405351.

The spelling of 330681991 in words is "three hundred thirty million, six hundred eighty-one thousand, nine hundred ninety-one".