993689842 has 4 divisors (see below), whose sum is σ = 1490534766. Its totient is φ = 496844920.

The previous prime is 993689833. The next prime is 993689849. The reversal of 993689842 is 248986399.

993689842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 792929281 + 200760561 = 28159^2 + 14169^2 .

It is not an unprimeable number, because it can be changed into a prime (993689849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248422459 + ... + 248422462.

Almost surely, 2^993689842 is an apocalyptic number.

993689842 is a deficient number, since it is larger than the sum of its proper divisors (496844924).

993689842 is a wasteful number, since it uses less digits than its factorization.

993689842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496844923.

The product of its digits is 6718464, while the sum is 58.

The square root of 993689842 is about 31522.8463499095. The cubic root of 993689842 is about 997.8921741920.

The spelling of 993689842 in words is "nine hundred ninety-three million, six hundred eighty-nine thousand, eight hundred forty-two".