757668749 has 2 divisors, whose sum is σ = 757668750. Its totient is φ = 757668748.

The previous prime is 757668731. The next prime is 757668781. The reversal of 757668749 is 947866757.

757668749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396288649 + 361380100 = 19907^2 + 19010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-757668749 is a prime.

It is a super-2 number, since 2×757668749² = 1148123866422450002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (757608749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378834374 + 378834375.

It is an arithmetic number, because the mean of its divisors is an integer number (378834375).

Almost surely, 2^757668749 is an apocalyptic number.

It is an amenable number.

757668749 is a deficient number, since it is larger than the sum of its proper divisors (1).

757668749 is an equidigital number, since it uses as much as digits as its factorization.

757668749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 59.

The square root of 757668749 is about 27525.7833494344. The cubic root of 757668749 is about 911.6464774032.

The spelling of 757668749 in words is "seven hundred fifty-seven million, six hundred sixty-eight thousand, seven hundred forty-nine".