689519357 has 2 divisors, whose sum is σ = 689519358. Its totient is φ = 689519356.

The previous prime is 689519297. The next prime is 689519393. The reversal of 689519357 is 753915986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679853476 + 9665881 = 26074^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 689519357 - 2⁶ = 689519293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689519299 and 689519308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689515357) 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, 344759678 + 344759679.

It is an arithmetic number, because the mean of its divisors is an integer number (344759679).

Almost surely, 2^689519357 is an apocalyptic number.

It is an amenable number.

689519357 is a deficient number, since it is larger than the sum of its proper divisors (1).

689519357 is an equidigital number, since it uses as much as digits as its factorization.

689519357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 53.

The square root of 689519357 is about 26258.7005961834. The cubic root of 689519357 is about 883.4503644474.

The spelling of 689519357 in words is "six hundred eighty-nine million, five hundred nineteen thousand, three hundred fifty-seven".