993198023 has 4 divisors (see below), whose sum is σ = 993264480. Its totient is φ = 993131568.

The previous prime is 993198007. The next prime is 993198053. The reversal of 993198023 is 320891399.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 320891399 = 19 ⋅16889021.

It is a cyclic number.

It is not a de Polignac number, because 993198023 - 2⁴ = 993198007 is a prime.

It is a super-2 number, since 2×993198023² = 1972884625782217058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993198053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818 + ... + 44576.

It is an arithmetic number, because the mean of its divisors is an integer number (248316120).

Almost surely, 2^993198023 is an apocalyptic number.

993198023 is a deficient number, since it is larger than the sum of its proper divisors (66457).

993198023 is a wasteful number, since it uses less digits than its factorization.

993198023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66456.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 993198023 is about 31515.0443915283. The cubic root of 993198023 is about 997.7275140528.

The spelling of 993198023 in words is "nine hundred ninety-three million, one hundred ninety-eight thousand, twenty-three".