191002 has 12 divisors (see below), whose sum is σ = 333450. Its totient is φ = 81816.

The previous prime is 190997. The next prime is 191021. The reversal of 191002 is 200191.

191002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 53361 = 371^2 + 231^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 877 + ... + 1072.

2¹⁹¹⁰⁰² is an apocalyptic number.

191002 is a deficient number, since it is larger than the sum of its proper divisors (142448).

191002 is a wasteful number, since it uses less digits than its factorization.

191002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1958 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 191002 is about 437.0377558061. The cubic root of 191002 is about 57.5898532152.

Adding to 191002 its reverse (200191), we get a palindrome (391193).

The spelling of 191002 in words is "one hundred ninety-one thousand, two".