30989 has 8 divisors (see below), whose sum is σ = 37440. Its totient is φ = 25056.

The previous prime is 30983. The next prime is 31013. The reversal of 30989 is 98903.

30989 is nontrivially palindromic in base 11.

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 30989 - 2¹² = 26893 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17 + ... + 249.

It is an arithmetic number, because the mean of its divisors is an integer number (4680).

2³⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

30989 is a deficient number, since it is larger than the sum of its proper divisors (6451).

30989 is a wasteful number, since it uses less digits than its factorization.

30989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 30989 is about 176.0369279441. The cubic root of 30989 is about 31.4100904728.

The spelling of 30989 in words is "thirty thousand, nine hundred eighty-nine".