1980311 has 8 divisors (see below), whose sum is σ = 2064384. Its totient is φ = 1897560.

The previous prime is 1980301. The next prime is 1980317. The reversal of 1980311 is 1130891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1980311 - 2⁶ = 1980247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3686 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (258048).

2^1980311 is an apocalyptic number.

1980311 is a deficient number, since it is larger than the sum of its proper divisors (84073).

1980311 is a wasteful number, since it uses less digits than its factorization.

1980311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1980311 is about 1407.2352326459. The cubic root of 1980311 is about 125.5772977143.

The spelling of 1980311 in words is "one million, nine hundred eighty thousand, three hundred eleven".