689594677 has 2 divisors, whose sum is σ = 689594678. Its totient is φ = 689594676.

The previous prime is 689594657. The next prime is 689594723. The reversal of 689594677 is 776495986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556676836 + 132917841 = 23594^2 + 11529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689594677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689594657) 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, 344797338 + 344797339.

It is an arithmetic number, because the mean of its divisors is an integer number (344797339).

Almost surely, 2^689594677 is an apocalyptic number.

It is an amenable number.

689594677 is a deficient number, since it is larger than the sum of its proper divisors (1).

689594677 is an equidigital number, since it uses as much as digits as its factorization.

689594677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The square root of 689594677 is about 26260.1347483215. The cubic root of 689594677 is about 883.4825313272.

The spelling of 689594677 in words is "six hundred eighty-nine million, five hundred ninety-four thousand, six hundred seventy-seven".