689830541 has 2 divisors, whose sum is σ = 689830542. Its totient is φ = 689830540.

The previous prime is 689830501. The next prime is 689830601. The reversal of 689830541 is 145038986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570015625 + 119814916 = 23875^2 + 10946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689830541 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 689830492 and 689830501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689830501) 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, 344915270 + 344915271.

It is an arithmetic number, because the mean of its divisors is an integer number (344915271).

Almost surely, 2^689830541 is an apocalyptic number.

It is an amenable number.

689830541 is a deficient number, since it is larger than the sum of its proper divisors (1).

689830541 is an equidigital number, since it uses as much as digits as its factorization.

689830541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 689830541 is about 26264.6252781189. The cubic root of 689830541 is about 883.5832465141.

The spelling of 689830541 in words is "six hundred eighty-nine million, eight hundred thirty thousand, five hundred forty-one".