1980709 has 8 divisors (see below), whose sum is σ = 2057792. Its totient is φ = 1905120.

The previous prime is 1980707. The next prime is 1980743. The reversal of 1980709 is 9070891.

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 1980709 - 2¹ = 1980707 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 (1980701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824 + ... + 3454.

It is an arithmetic number, because the mean of its divisors is an integer number (257224).

2^1980709 is an apocalyptic number.

It is an amenable number.

1980709 is a deficient number, since it is larger than the sum of its proper divisors (77083).

1980709 is an equidigital number, since it uses as much as digits as its factorization.

1980709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1980709 is about 1407.3766375779. The cubic root of 1980709 is about 125.5857099311.

The spelling of 1980709 in words is "one million, nine hundred eighty thousand, seven hundred nine".