189902 has 4 divisors (see below), whose sum is σ = 284856. Its totient is φ = 94950.

The previous prime is 189901. The next prime is 189913. The reversal of 189902 is 209981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209981 = 59 ⋅3559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47474 + ... + 47477.

It is an arithmetic number, because the mean of its divisors is an integer number (71214).

2¹⁸⁹⁹⁰² is an apocalyptic number.

189902 is a deficient number, since it is larger than the sum of its proper divisors (94954).

189902 is an equidigital number, since it uses as much as digits as its factorization.

189902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94953.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 189902 is about 435.7774661453. Note that the first 3 decimals coincide. The cubic root of 189902 is about 57.4790850209.

The spelling of 189902 in words is "one hundred eighty-nine thousand, nine hundred two".