743285793521 has 2 divisors, whose sum is σ = 743285793522. Its totient is φ = 743285793520.

The previous prime is 743285793463. The next prime is 743285793533. The reversal of 743285793521 is 125397582347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415373805025 + 327911988496 = 644495^2 + 572636^2 .

It is a cyclic number.

It is not a de Polignac number, because 743285793521 - 2¹⁰ = 743285792497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (743285793571) 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, 371642896760 + 371642896761.

It is an arithmetic number, because the mean of its divisors is an integer number (371642896761).

Almost surely, 2^743285793521 is an apocalyptic number.

It is an amenable number.

743285793521 is a deficient number, since it is larger than the sum of its proper divisors (1).

743285793521 is an equidigital number, since it uses as much as digits as its factorization.

743285793521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 56.

The spelling of 743285793521 in words is "seven hundred forty-three billion, two hundred eighty-five million, seven hundred ninety-three thousand, five hundred twenty-one".