743373781 has 2 divisors, whose sum is σ = 743373782. Its totient is φ = 743373780.

The previous prime is 743373767. The next prime is 743373793. The reversal of 743373781 is 187373347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742835025 + 538756 = 27255^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 743373781 - 2¹⁵ = 743341013 is a prime.

It is a super-2 number, since 2×743373781² = 1105209156556471922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743373721) 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, 371686890 + 371686891.

It is an arithmetic number, because the mean of its divisors is an integer number (371686891).

Almost surely, 2^743373781 is an apocalyptic number.

It is an amenable number.

743373781 is a deficient number, since it is larger than the sum of its proper divisors (1).

743373781 is an equidigital number, since it uses as much as digits as its factorization.

743373781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 43.

The square root of 743373781 is about 27264.8818262614. The cubic root of 743373781 is about 905.8766800624.

The spelling of 743373781 in words is "seven hundred forty-three million, three hundred seventy-three thousand, seven hundred eighty-one".