749968781 has 2 divisors, whose sum is σ = 749968782. Its totient is φ = 749968780.

The previous prime is 749968759. The next prime is 749968819. The reversal of 749968781 is 187869947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648160681 + 101808100 = 25459^2 + 10090^2 .

It is a cyclic number.

It is not a de Polignac number, because 749968781 - 2⁶ = 749968717 is a prime.

It is a super-2 number, since 2×749968781² = 1124906344949251922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 749968781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749968711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374984390 + 374984391.

It is an arithmetic number, because the mean of its divisors is an integer number (374984391).

Almost surely, 2^749968781 is an apocalyptic number.

It is an amenable number.

749968781 is a deficient number, since it is larger than the sum of its proper divisors (1).

749968781 is an equidigital number, since it uses as much as digits as its factorization.

749968781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 59.

The square root of 749968781 is about 27385.5578909760. The cubic root of 749968781 is about 908.5476898661.

The spelling of 749968781 in words is "seven hundred forty-nine million, nine hundred sixty-eight thousand, seven hundred eighty-one".