2433997781 has 2 divisors, whose sum is σ = 2433997782. Its totient is φ = 2433997780.

The previous prime is 2433997711. The next prime is 2433997807. The reversal of 2433997781 is 1877993342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2380561681 + 53436100 = 48791^2 + 7310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2433997781 - 2¹⁰ = 2433996757 is a prime.

It is a super-2 number, since 2×2433997781² = 11848690395825847922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2433997711) 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, 1216998890 + 1216998891.

It is an arithmetic number, because the mean of its divisors is an integer number (1216998891).

Almost surely, 2^2433997781 is an apocalyptic number.

It is an amenable number.

2433997781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2433997781 is an equidigital number, since it uses as much as digits as its factorization.

2433997781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 2433997781 is about 49335.5630453327. The cubic root of 2433997781 is about 1345.1582905885.

The spelling of 2433997781 in words is "two billion, four hundred thirty-three million, nine hundred ninety-seven thousand, seven hundred eighty-one".