765749 has 2 divisors, whose sum is σ = 765750. Its totient is φ = 765748.

The previous prime is 765727. The next prime is 765763. The reversal of 765749 is 947567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628849 + 136900 = 793^2 + 370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-765749 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765649) 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, 382874 + 382875.

It is an arithmetic number, because the mean of its divisors is an integer number (382875).

2⁷⁶⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

765749 is a deficient number, since it is larger than the sum of its proper divisors (1).

765749 is an equidigital number, since it uses as much as digits as its factorization.

765749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 765749 is about 875.0708542741. The cubic root of 765749 is about 91.4875813020.

It can be divided in two parts, 765 and 749, that multiplied together give a triangular number (572985 = T₁₀₇₀).

The spelling of 765749 in words is "seven hundred sixty-five thousand, seven hundred forty-nine".