749270761 has 2 divisors, whose sum is σ = 749270762. Its totient is φ = 749270760.

The previous prime is 749270749. The next prime is 749270771. The reversal of 749270761 is 167072947.

749270761 = 19355² + 19356².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374654736 + 374616025 = 19356^2 + 19355^2 .

It is a cyclic number.

It is not a de Polignac number, because 749270761 - 2⁵ = 749270729 is a prime.

It is a super-2 number, since 2×749270761² = 1122813346579038242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (749270771) 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, 374635380 + 374635381.

It is an arithmetic number, because the mean of its divisors is an integer number (374635381).

Almost surely, 2^749270761 is an apocalyptic number.

749270761 is the 19356-th centered square number.

It is an amenable number.

749270761 is a deficient number, since it is larger than the sum of its proper divisors (1).

749270761 is an equidigital number, since it uses as much as digits as its factorization.

749270761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 749270761 is about 27372.8106156456. The cubic root of 749270761 is about 908.2657308796.

The spelling of 749270761 in words is "seven hundred forty-nine million, two hundred seventy thousand, seven hundred sixty-one".