743872847281 has 2 divisors, whose sum is σ = 743872847282. Its totient is φ = 743872847280.

The previous prime is 743872847251. The next prime is 743872847293. The reversal of 743872847281 is 182748278347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525021973056 + 218850874225 = 724584^2 + 467815^2 .

It is a cyclic number.

It is not a de Polignac number, because 743872847281 - 2¹⁹ = 743872322993 is a prime.

It is a super-2 number, since 2×743872847281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (743872847251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371936423640 + 371936423641.

It is an arithmetic number, because the mean of its divisors is an integer number (371936423641).

Almost surely, 2^743872847281 is an apocalyptic number.

It is an amenable number.

743872847281 is a deficient number, since it is larger than the sum of its proper divisors (1).

743872847281 is an equidigital number, since it uses as much as digits as its factorization.

743872847281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33718272, while the sum is 61.

The spelling of 743872847281 in words is "seven hundred forty-three billion, eight hundred seventy-two million, eight hundred forty-seven thousand, two hundred eighty-one".