994388513 has 2 divisors, whose sum is σ = 994388514. Its totient is φ = 994388512.

The previous prime is 994388467. The next prime is 994388567. The reversal of 994388513 is 315883499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502790929 + 491597584 = 22423^2 + 22172^2 .

It is a cyclic number.

It is not a de Polignac number, because 994388513 - 2⁶ = 994388449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (994388573) 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, 497194256 + 497194257.

It is an arithmetic number, because the mean of its divisors is an integer number (497194257).

Almost surely, 2^994388513 is an apocalyptic number.

It is an amenable number.

994388513 is a deficient number, since it is larger than the sum of its proper divisors (1).

994388513 is an equidigital number, since it uses as much as digits as its factorization.

994388513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 994388513 is about 31533.9263809631. The cubic root of 994388513 is about 998.1259946310.

The spelling of 994388513 in words is "nine hundred ninety-four million, three hundred eighty-eight thousand, five hundred thirteen".