550634621 has 2 divisors, whose sum is σ = 550634622. Its totient is φ = 550634620.

The previous prime is 550634593. The next prime is 550634659. The reversal of 550634621 is 126436055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 460574521 + 90060100 = 21461^2 + 9490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550634621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550634671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275317310 + 275317311.

It is an arithmetic number, because the mean of its divisors is an integer number (275317311).

Almost surely, 2^550634621 is an apocalyptic number.

It is an amenable number.

550634621 is a deficient number, since it is larger than the sum of its proper divisors (1).

550634621 is an equidigital number, since it uses as much as digits as its factorization.

550634621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 550634621 is about 23465.6050635819. The cubic root of 550634621 is about 819.6362758287.

The spelling of 550634621 in words is "five hundred fifty million, six hundred thirty-four thousand, six hundred twenty-one".