233913189689 has 2 divisors, whose sum is σ = 233913189690. Its totient is φ = 233913189688.

The previous prime is 233913189667. The next prime is 233913189691. The reversal of 233913189689 is 986981319332.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196089552400 + 37823637289 = 442820^2 + 194483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233913189689 is a prime.

Together with 233913189691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (233913189649) 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 as a sum of consecutive naturals, namely, 116956594844 + 116956594845.

It is an arithmetic number, because the mean of its divisors is an integer number (116956594845).

Almost surely, 2^233913189689 is an apocalyptic number.

It is an amenable number.

233913189689 is a deficient number, since it is larger than the sum of its proper divisors (1).

233913189689 is an equidigital number, since it uses as much as digits as its factorization.

233913189689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 62.

The spelling of 233913189689 in words is "two hundred thirty-three billion, nine hundred thirteen million, one hundred eighty-nine thousand, six hundred eighty-nine".