993349018 has 4 divisors (see below), whose sum is σ = 1490023530. Its totient is φ = 496674508.

The previous prime is 993348973. The next prime is 993349037. The reversal of 993349018 is 810943399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810943399 = 7 ⋅115849057.

It can be written as a sum of positive squares in only one way, i.e., 991179289 + 2169729 = 31483^2 + 1473^2 .

It is an unprimeable number.

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, 248337253 + ... + 248337256.

Almost surely, 2^993349018 is an apocalyptic number.

993349018 is a deficient number, since it is larger than the sum of its proper divisors (496674512).

993349018 is a wasteful number, since it uses less digits than its factorization.

993349018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496674511.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 993349018 is about 31517.4399023779. The cubic root of 993349018 is about 997.7780726956.

The spelling of 993349018 in words is "nine hundred ninety-three million, three hundred forty-nine thousand, eighteen".