1980117 has 6 divisors (see below), whose sum is σ = 2860182. Its totient is φ = 1320072.

The previous prime is 1980113. The next prime is 1980169. The reversal of 1980117 is 7110891.

It can be written as a sum of positive squares in only one way, i.e., 1758276 + 221841 = 1326^2 + 471^2 .

It is not a de Polignac number, because 1980117 - 2² = 1980113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109998 + ... + 110015.

It is an arithmetic number, because the mean of its divisors is an integer number (476697).

2^1980117 is an apocalyptic number.

It is an amenable number.

1980117 is a deficient number, since it is larger than the sum of its proper divisors (880065).

1980117 is a wasteful number, since it uses less digits than its factorization.

1980117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220019 (or 220016 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1980117 is about 1407.1663014726. The cubic root of 1980117 is about 125.5731968784.

The spelling of 1980117 in words is "one million, nine hundred eighty thousand, one hundred seventeen".