743378081 has 2 divisors, whose sum is σ = 743378082. Its totient is φ = 743378080.

The previous prime is 743377981. The next prime is 743378099. The reversal of 743378081 is 180873347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 596580625 + 146797456 = 24425^2 + 12116^2 .

It is an emirp because it is prime and its reverse (180873347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743378081 is a prime.

It is a super-2 number, since 2×743378081² = 1105221942622485122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (743378381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371689040 + 371689041.

It is an arithmetic number, because the mean of its divisors is an integer number (371689041).

Almost surely, 2^743378081 is an apocalyptic number.

It is an amenable number.

743378081 is a deficient number, since it is larger than the sum of its proper divisors (1).

743378081 is an equidigital number, since it uses as much as digits as its factorization.

743378081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 743378081 is about 27264.9606821649. The cubic root of 743378081 is about 905.8784267217.

The spelling of 743378081 in words is "seven hundred forty-three million, three hundred seventy-eight thousand, eighty-one".