1980711 has 12 divisors (see below), whose sum is σ = 2890680. Its totient is φ = 1306800.

The previous prime is 1980707. The next prime is 1980743. The reversal of 1980711 is 1170891.

It is not a de Polignac number, because 1980711 - 2² = 1980707 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181 + ... + 1998.

It is an arithmetic number, because the mean of its divisors is an integer number (240890).

2^1980711 is an apocalyptic number.

1980711 is a deficient number, since it is larger than the sum of its proper divisors (909969).

1980711 is a wasteful number, since it uses less digits than its factorization.

1980711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286 (or 2283 counting only the distinct ones).

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

The square root of 1980711 is about 1407.3773481195. The cubic root of 1980711 is about 125.5857522007.

The spelling of 1980711 in words is "one million, nine hundred eighty thousand, seven hundred eleven".