99980042 has 8 divisors (see below), whose sum is σ = 150068100.
Its totient is φ = 49957344.
The previous prime is 99980003. The next prime is 99980047. The reversal of 99980042 is 24008999.
Subtracting from 99980042 its sum of digits (41), we obtain a square (99980001 = 99992).
It can be written as a sum of positive squares in 2 ways, for example, as 88153321 + 11826721 = 9389^2 + 3439^2
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 (99980047) 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, 12317 + ... + 18752.
Almost surely, 299980042 is an apocalyptic number.
99980042 is a deficient number, since it is larger than the sum of its proper divisors (50088058).
99980042 is a wasteful number, since it uses less digits than its factorization.
99980042 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 32680.
The product of its (nonzero) digits is 46656, while the sum is 41.
The square root of 99980042 is about 9999.0020502048.
The cubic root of 99980042 is about 464.1280023635.
The spelling of 99980042 in words is "ninety-nine million, nine hundred eighty thousand, forty-two".