994130581 has 2 divisors, whose sum is σ = 994130582. Its totient is φ = 994130580.

The previous prime is 994130561. The next prime is 994130609. The reversal of 994130581 is 185031499.

994130581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972878481 + 21252100 = 31191^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 994130581 - 2¹⁷ = 993999509 is a prime.

It is a super-2 number, since 2×994130581² = 1976591224158795122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994130561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497065290 + 497065291.

It is an arithmetic number, because the mean of its divisors is an integer number (497065291).

Almost surely, 2^994130581 is an apocalyptic number.

It is an amenable number.

994130581 is a deficient number, since it is larger than the sum of its proper divisors (1).

994130581 is an equidigital number, since it uses as much as digits as its factorization.

994130581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 994130581 is about 31529.8363617701. The cubic root of 994130581 is about 998.0396866827.

The spelling of 994130581 in words is "nine hundred ninety-four million, one hundred thirty thousand, five hundred eighty-one".