233330989 has 2 divisors, whose sum is σ = 233330990. Its totient is φ = 233330988.

The previous prime is 233330987. The next prime is 233331023. The reversal of 233330989 is 989033332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179426025 + 53904964 = 13395^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 233330989 - 2¹ = 233330987 is a prime.

Together with 233330987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233330987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116665494 + 116665495.

It is an arithmetic number, because the mean of its divisors is an integer number (116665495).

Almost surely, 2^233330989 is an apocalyptic number.

It is an amenable number.

233330989 is a deficient number, since it is larger than the sum of its proper divisors (1).

233330989 is an equidigital number, since it uses as much as digits as its factorization.

233330989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 233330989 is about 15275.1755800056. The cubic root of 233330989 is about 615.6361883406.

The spelling of 233330989 in words is "two hundred thirty-three million, three hundred thirty thousand, nine hundred eighty-nine".