233934982781 has 2 divisors, whose sum is σ = 233934982782. Its totient is φ = 233934982780.

The previous prime is 233934982739. The next prime is 233934982907. The reversal of 233934982781 is 187289439332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212774625625 + 21160357156 = 461275^2 + 145466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233934982781 is a prime.

It is a super-2 number, since 2×233934982781² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 233934982781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233934942781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116967491390 + 116967491391.

It is an arithmetic number, because the mean of its divisors is an integer number (116967491391).

Almost surely, 2^233934982781 is an apocalyptic number.

It is an amenable number.

233934982781 is a deficient number, since it is larger than the sum of its proper divisors (1).

233934982781 is an equidigital number, since it uses as much as digits as its factorization.

233934982781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 59.

The spelling of 233934982781 in words is "two hundred thirty-three billion, nine hundred thirty-four million, nine hundred eighty-two thousand, seven hundred eighty-one".