554459621 has 2 divisors, whose sum is σ = 554459622. Its totient is φ = 554459620.

The previous prime is 554459603. The next prime is 554459627. The reversal of 554459621 is 126954455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317730625 + 236728996 = 17825^2 + 15386^2 .

It is a cyclic number.

It is not a de Polignac number, because 554459621 - 2⁶ = 554459557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554459627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277229810 + 277229811.

It is an arithmetic number, because the mean of its divisors is an integer number (277229811).

Almost surely, 2^554459621 is an apocalyptic number.

It is an amenable number.

554459621 is a deficient number, since it is larger than the sum of its proper divisors (1).

554459621 is an equidigital number, since it uses as much as digits as its factorization.

554459621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The square root of 554459621 is about 23546.9662801814. The cubic root of 554459621 is about 821.5297741948.

The spelling of 554459621 in words is "five hundred fifty-four million, four hundred fifty-nine thousand, six hundred twenty-one".