233853989 has 4 divisors (see below), whose sum is σ = 247610124. Its totient is φ = 220097856.

The previous prime is 233853979. The next prime is 233854001. The reversal of 233853989 is 989358332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63760225 + 170093764 = 7985^2 + 13042^2 .

It is a cyclic number.

It is not a de Polignac number, because 233853989 - 2⁴ = 233853973 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 (233853959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6878042 + ... + 6878075.

It is an arithmetic number, because the mean of its divisors is an integer number (61902531).

Almost surely, 2^233853989 is an apocalyptic number.

It is an amenable number.

233853989 is a deficient number, since it is larger than the sum of its proper divisors (13756135).

233853989 is a wasteful number, since it uses less digits than its factorization.

233853989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756134.

The product of its digits is 1399680, while the sum is 50.

The square root of 233853989 is about 15292.2852772239. The cubic root of 233853989 is about 616.0958179012.

The spelling of 233853989 in words is "two hundred thirty-three million, eight hundred fifty-three thousand, nine hundred eighty-nine".