233340781 has 2 divisors, whose sum is σ = 233340782. Its totient is φ = 233340780.

The previous prime is 233340763. The next prime is 233340817. The reversal of 233340781 is 187043332.

Together with next prime (233340817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229977225 + 3363556 = 15165^2 + 1834^2 .

It is a cyclic number.

It is not a de Polignac number, because 233340781 - 2⁹ = 233340269 is a prime.

It is a super-2 number, since 2×233340781² = 108895840155379922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233347781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116670390 + 116670391.

It is an arithmetic number, because the mean of its divisors is an integer number (116670391).

Almost surely, 2^233340781 is an apocalyptic number.

It is an amenable number.

233340781 is a deficient number, since it is larger than the sum of its proper divisors (1).

233340781 is an equidigital number, since it uses as much as digits as its factorization.

233340781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 233340781 is about 15275.4960966903. The cubic root of 233340781 is about 615.6448001774.

The spelling of 233340781 in words is "two hundred thirty-three million, three hundred forty thousand, seven hundred eighty-one".