994585621 has 2 divisors, whose sum is σ = 994585622. Its totient is φ = 994585620.

The previous prime is 994585607. The next prime is 994585639. The reversal of 994585621 is 126585499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953944996 + 40640625 = 30886^2 + 6375^2 .

It is a cyclic number.

It is not a de Polignac number, because 994585621 - 2¹¹ = 994583573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994585601) 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, 497292810 + 497292811.

It is an arithmetic number, because the mean of its divisors is an integer number (497292811).

Almost surely, 2^994585621 is an apocalyptic number.

It is an amenable number.

994585621 is a deficient number, since it is larger than the sum of its proper divisors (1).

994585621 is an equidigital number, since it uses as much as digits as its factorization.

994585621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 49.

The square root of 994585621 is about 31537.0515584447. The cubic root of 994585621 is about 998.1919398889.

The spelling of 994585621 in words is "nine hundred ninety-four million, five hundred eighty-five thousand, six hundred twenty-one".