201992 has 16 divisors (see below), whose sum is σ = 432960. Its totient is φ = 86544.

The previous prime is 201979. The next prime is 201997. The reversal of 201992 is 299102.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201992.

It is not an unprimeable number, because it can be changed into a prime (201997) by changing a digit.

201992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (27060).

2²⁰¹⁹⁹² is an apocalyptic number.

It is an amenable number.

201992 is an abundant number, since it is smaller than the sum of its proper divisors (230968).

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

201992 is a wasteful number, since it uses less digits than its factorization.

201992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 201992 is about 449.4352011136. The cubic root of 201992 is about 58.6738684915.

The spelling of 201992 in words is "two hundred one thousand, nine hundred ninety-two".