993905042 has 8 divisors (see below), whose sum is σ = 1605538956. Its totient is φ = 458725392.

The previous prime is 993905041. The next prime is 993905057. The reversal of 993905042 is 240509399.

It can be written as a sum of positive squares in 2 ways, for example, as 948085681 + 45819361 = 30791^2 + 6769^2 .

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

It is not an unprimeable number, because it can be changed into a prime (993905041) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 19113533 + ... + 19113584.

Almost surely, 2^993905042 is an apocalyptic number.

993905042 is a deficient number, since it is larger than the sum of its proper divisors (611633914).

993905042 is a wasteful number, since it uses less digits than its factorization.

993905042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38227132.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 993905042 is about 31526.2595624663. The cubic root of 993905042 is about 997.9642056873.

The spelling of 993905042 in words is "nine hundred ninety-three million, nine hundred five thousand, forty-two".