994882561 has 2 divisors, whose sum is σ = 994882562. Its totient is φ = 994882560.

The previous prime is 994882547. The next prime is 994882573. The reversal of 994882561 is 165288499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627201936 + 367680625 = 25044^2 + 19175^2 .

It is an emirp because it is prime and its reverse (165288499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994882561 - 2¹³ = 994874369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 994882499 and 994882508.

It is not a weakly prime, because it can be changed into another prime (994882591) 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, 497441280 + 497441281.

It is an arithmetic number, because the mean of its divisors is an integer number (497441281).

Almost surely, 2^994882561 is an apocalyptic number.

It is an amenable number.

994882561 is a deficient number, since it is larger than the sum of its proper divisors (1).

994882561 is an equidigital number, since it uses as much as digits as its factorization.

994882561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 994882561 is about 31541.7590029472. The cubic root of 994882561 is about 998.2912689011.

The spelling of 994882561 in words is "nine hundred ninety-four million, eight hundred eighty-two thousand, five hundred sixty-one".