628441553 has 2 divisors, whose sum is σ = 628441554. Its totient is φ = 628441552.

The previous prime is 628441523. The next prime is 628441573. The reversal of 628441553 is 355144826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423865744 + 204575809 = 20588^2 + 14303^2 .

It is a cyclic number.

It is not a de Polignac number, because 628441553 - 2¹² = 628437457 is a prime.

It is a super-3 number, since 3×628441553³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (628441523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314220776 + 314220777.

It is an arithmetic number, because the mean of its divisors is an integer number (314220777).

Almost surely, 2^628441553 is an apocalyptic number.

It is an amenable number.

628441553 is a deficient number, since it is larger than the sum of its proper divisors (1).

628441553 is an equidigital number, since it uses as much as digits as its factorization.

628441553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 38.

The square root of 628441553 is about 25068.7365656907. The cubic root of 628441553 is about 856.5544277210.

The spelling of 628441553 in words is "six hundred twenty-eight million, four hundred forty-one thousand, five hundred fifty-three".