993988019 has 8 divisors (see below), whose sum is σ = 1005572880. Its totient is φ = 982466176.

The previous prime is 993988013. The next prime is 993988031. The reversal of 993988019 is 910889399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 993988019 - 2¹² = 993983923 is a prime.

It is a super-2 number, since 2×993988019² = 1976024363831088722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993988013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16352 + ... + 47490.

It is an arithmetic number, because the mean of its divisors is an integer number (125696610).

Almost surely, 2^993988019 is an apocalyptic number.

993988019 is a deficient number, since it is larger than the sum of its proper divisors (11584861).

993988019 is a wasteful number, since it uses less digits than its factorization.

993988019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31509.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 993988019 is about 31527.5755331741. The cubic root of 993988019 is about 997.9919768754.

The spelling of 993988019 in words is "nine hundred ninety-three million, nine hundred eighty-eight thousand, nineteen".