743721398773 has 2 divisors, whose sum is σ = 743721398774. Its totient is φ = 743721398772.

The previous prime is 743721398767. The next prime is 743721398789. The reversal of 743721398773 is 377893127347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736862577649 + 6858821124 = 858407^2 + 82818^2 .

It is a cyclic number.

It is not a de Polignac number, because 743721398773 - 2¹⁷ = 743721267701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743721396773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371860699386 + 371860699387.

It is an arithmetic number, because the mean of its divisors is an integer number (371860699387).

Almost surely, 2^743721398773 is an apocalyptic number.

It is an amenable number.

743721398773 is a deficient number, since it is larger than the sum of its proper divisors (1).

743721398773 is an equidigital number, since it uses as much as digits as its factorization.

743721398773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37340352, while the sum is 61.

The spelling of 743721398773 in words is "seven hundred forty-three billion, seven hundred twenty-one million, three hundred ninety-eight thousand, seven hundred seventy-three".