993721930 has 8 divisors (see below), whose sum is σ = 1788699492. Its totient is φ = 397488768.

The previous prime is 993721921. The next prime is 993721973. The reversal of 993721930 is 39127399.

It can be written as a sum of positive squares in 2 ways, for example, as 956108241 + 37613689 = 30921^2 + 6133^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 49686087 + ... + 49686106.

Almost surely, 2^993721930 is an apocalyptic number.

993721930 is a deficient number, since it is larger than the sum of its proper divisors (794977562).

993721930 is a wasteful number, since it uses less digits than its factorization.

993721930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99372200.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 993721930 is about 31523.3553099920. The cubic root of 993721930 is about 997.9029153100.

The spelling of 993721930 in words is "nine hundred ninety-three million, seven hundred twenty-one thousand, nine hundred thirty".