1982173 has 2 divisors, whose sum is σ = 1982174. Its totient is φ = 1982172.

The previous prime is 1982159. The next prime is 1982191. The reversal of 1982173 is 3712891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1570009 + 412164 = 1253^2 + 642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982173 is a prime.

1982173 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991086 + 991087.

It is an arithmetic number, because the mean of its divisors is an integer number (991087).

2^1982173 is an apocalyptic number.

It is an amenable number.

1982173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982173 is an equidigital number, since it uses as much as digits as its factorization.

1982173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 1982173 is about 1407.8966581394. The cubic root of 1982173 is about 125.6166436691.

The spelling of 1982173 in words is "one million, nine hundred eighty-two thousand, one hundred seventy-three".