234823788581 has 2 divisors, whose sum is σ = 234823788582. Its totient is φ = 234823788580.

The previous prime is 234823788547. The next prime is 234823788599. The reversal of 234823788581 is 185887328432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177943923556 + 56879865025 = 421834^2 + 238495^2 .

It is a cyclic number.

It is not a de Polignac number, because 234823788581 - 2¹⁰ = 234823787557 is a prime.

It is a super-2 number, since 2×234823788581² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 234823788581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234823782581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117411894290 + 117411894291.

It is an arithmetic number, because the mean of its divisors is an integer number (117411894291).

Almost surely, 2^234823788581 is an apocalyptic number.

It is an amenable number.

234823788581 is a deficient number, since it is larger than the sum of its proper divisors (1).

234823788581 is an equidigital number, since it uses as much as digits as its factorization.

234823788581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20643840, while the sum is 59.

The spelling of 234823788581 in words is "two hundred thirty-four billion, eight hundred twenty-three million, seven hundred eighty-eight thousand, five hundred eighty-one".