993516287 has 2 divisors, whose sum is σ = 993516288. Its totient is φ = 993516286.

The previous prime is 993516259. The next prime is 993516311. The reversal of 993516287 is 782615399.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 993516287 - 2⁸ = 993516031 is a prime.

It is a super-2 number, since 2×993516287² = 1974149225068532738, 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 (993516187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496758143 + 496758144.

It is an arithmetic number, because the mean of its divisors is an integer number (496758144).

Almost surely, 2^993516287 is an apocalyptic number.

993516287 is a deficient number, since it is larger than the sum of its proper divisors (1).

993516287 is an equidigital number, since it uses as much as digits as its factorization.

993516287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 993516287 is about 31520.0933850139. The cubic root of 993516287 is about 997.8340744870.

The spelling of 993516287 in words is "nine hundred ninety-three million, five hundred sixteen thousand, two hundred eighty-seven".