993978883 has 2 divisors, whose sum is σ = 993978884. Its totient is φ = 993978882.

The previous prime is 993978697. The next prime is 993978917. The reversal of 993978883 is 388879399.

It is a strong prime.

It is an emirp because it is prime and its reverse (388879399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993978883 - 2²⁹ = 457107971 is a prime.

It is a super-3 number, since 3×993978883³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (993975883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496989441 + 496989442.

It is an arithmetic number, because the mean of its divisors is an integer number (496989442).

Almost surely, 2^993978883 is an apocalyptic number.

993978883 is a deficient number, since it is larger than the sum of its proper divisors (1).

993978883 is an equidigital number, since it uses as much as digits as its factorization.

993978883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 64.

The square root of 993978883 is about 31527.4306438060. The cubic root of 993978883 is about 997.9889192655.

The spelling of 993978883 in words is "nine hundred ninety-three million, nine hundred seventy-eight thousand, eight hundred eighty-three".