30989943 has 6 divisors (see below), whose sum is σ = 44763264. Its totient is φ = 20659956.

The previous prime is 30989939. The next prime is 30989989. The reversal of 30989943 is 34998903.

It is not a de Polignac number, because 30989943 - 2² = 30989939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30989743) 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 5 ways as a sum of consecutive naturals, for example, 1721655 + ... + 1721672.

It is an arithmetic number, because the mean of its divisors is an integer number (7460544).

Almost surely, 2^30989943 is an apocalyptic number.

30989943 is a deficient number, since it is larger than the sum of its proper divisors (13773321).

30989943 is a wasteful number, since it uses less digits than its factorization.

30989943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443333 (or 3443330 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 30989943 is about 5566.8611443074. The cubic root of 30989943 is about 314.1040907421.

It can be divided in two parts, 3098 and 9943, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 30989943 in words is "thirty million, nine hundred eighty-nine thousand, nine hundred forty-three".