761689 has 2 divisors, whose sum is σ = 761690. Its totient is φ = 761688.

The previous prime is 761681. The next prime is 761711. The reversal of 761689 is 986167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751689 + 10000 = 867^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 761689 - 2³ = 761681 is a prime.

It is not a weakly prime, because it can be changed into another prime (761681) 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, 380844 + 380845.

It is an arithmetic number, because the mean of its divisors is an integer number (380845).

2⁷⁶¹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

761689 is a deficient number, since it is larger than the sum of its proper divisors (1).

761689 is an equidigital number, since it uses as much as digits as its factorization.

761689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 761689 is about 872.7479590351. The cubic root of 761689 is about 91.3256056947.

The spelling of 761689 in words is "seven hundred sixty-one thousand, six hundred eighty-nine".