993799643 has 8 divisors (see below), whose sum is σ = 1027307520. Its totient is φ = 960382440.

The previous prime is 993799633. The next prime is 993799649. The reversal of 993799643 is 346997399.

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 993799643 - 2¹² = 993795547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993799649) 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, 5 + ... + 44582.

It is an arithmetic number, because the mean of its divisors is an integer number (128413440).

Almost surely, 2^993799643 is an apocalyptic number.

993799643 is a deficient number, since it is larger than the sum of its proper divisors (33507877).

993799643 is a wasteful number, since it uses less digits than its factorization.

993799643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45337.

The product of its digits is 9920232, while the sum is 59.

The square root of 993799643 is about 31524.5879116603. The cubic root of 993799643 is about 997.9289279551.

The spelling of 993799643 in words is "nine hundred ninety-three million, seven hundred ninety-nine thousand, six hundred forty-three".