559690421 has 2 divisors, whose sum is σ = 559690422. Its totient is φ = 559690420.

The previous prime is 559690403. The next prime is 559690423. The reversal of 559690421 is 124096955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550606225 + 9084196 = 23465^2 + 3014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-559690421 is a prime.

Together with 559690423, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_29326865 and since 559690421 and 29326865 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (559690423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279845210 + 279845211.

It is an arithmetic number, because the mean of its divisors is an integer number (279845211).

Almost surely, 2^559690421 is an apocalyptic number.

It is an amenable number.

559690421 is a deficient number, since it is larger than the sum of its proper divisors (1).

559690421 is an equidigital number, since it uses as much as digits as its factorization.

559690421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 559690421 is about 23657.7771779176. Note that the first 3 decimals coincide. The cubic root of 559690421 is about 824.1051434663.

The spelling of 559690421 in words is "five hundred fifty-nine million, six hundred ninety thousand, four hundred twenty-one".