756689 has 2 divisors, whose sum is σ = 756690. Its totient is φ = 756688.

The previous prime is 756683. The next prime is 756703. The reversal of 756689 is 986657.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 8464 = 865^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 756689 - 2⁴ = 756673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (756683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378344 + 378345.

It is an arithmetic number, because the mean of its divisors is an integer number (378345).

2⁷⁵⁶⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

756689 is a deficient number, since it is larger than the sum of its proper divisors (1).

756689 is an equidigital number, since it uses as much as digits as its factorization.

756689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 756689 is about 869.8787271798. The cubic root of 756689 is about 91.1253354860.

The spelling of 756689 in words is "seven hundred fifty-six thousand, six hundred eighty-nine".