199942000 has 40 divisors (see below), whose sum is σ = 483464592. Its totient is φ = 79976000.

The previous prime is 199941991. The next prime is 199942009. The reversal of 199942000 is 249991.

It is an interprime number because it is at equal distance from previous prime (199941991) and next prime (199942009).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199942009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47986 + ... + 51985.

Almost surely, 2^199942000 is an apocalyptic number.

199942000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199942000 is an abundant number, since it is smaller than the sum of its proper divisors (283522592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199942000 is an equidigital number, since it uses as much as digits as its factorization.

199942000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99994 (or 99978 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 199942000 is about 14140.0848653747. The cubic root of 199942000 is about 584.7470111674.

The spelling of 199942000 in words is "one hundred ninety-nine million, nine hundred forty-two thousand".