330031993 has 4 divisors (see below), whose sum is σ = 331413120. Its totient is φ = 328650868.

The previous prime is 330031937. The next prime is 330032023. The reversal of 330031993 is 399130033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399130033 = 643 ⋅620731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-330031993 is a prime.

It is a super-2 number, since 2×330031993² = 217842232807104098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (330032993) 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, 690205 + ... + 690682.

It is an arithmetic number, because the mean of its divisors is an integer number (82853280).

Almost surely, 2^330031993 is an apocalyptic number.

It is an amenable number.

330031993 is a deficient number, since it is larger than the sum of its proper divisors (1381127).

330031993 is a wasteful number, since it uses less digits than its factorization.

330031993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381126.

The product of its (nonzero) digits is 6561, while the sum is 31.

The square root of 330031993 is about 18166.7826815867. The cubic root of 330031993 is about 691.0646541149.

The spelling of 330031993 in words is "three hundred thirty million, thirty-one thousand, nine hundred ninety-three".