900553 has 2 divisors, whose sum is σ = 900554. Its totient is φ = 900552.

The previous prime is 900551. The next prime is 900563. The reversal of 900553 is 355009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 1849 = 948^2 + 43^2 .

It is an emirp because it is prime and its reverse (355009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900553 - 2¹ = 900551 is a prime.

Together with 900551, it forms a pair of twin primes.

900553 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (900551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450276 + 450277.

It is an arithmetic number, because the mean of its divisors is an integer number (450277).

2⁹⁰⁰⁵⁵³ is an apocalyptic number.

It is an amenable number.

900553 is a deficient number, since it is larger than the sum of its proper divisors (1).

900553 is an equidigital number, since it uses as much as digits as its factorization.

900553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 900553 is about 948.9747098843. The cubic root of 900553 is about 96.5687090648.

The spelling of 900553 in words is "nine hundred thousand, five hundred fifty-three".