1980579 has 8 divisors (see below), whose sum is σ = 2779840. Its totient is φ = 1250856.

The previous prime is 1980577. The next prime is 1980581. The reversal of 1980579 is 9750891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1980577) and next prime (1980581).

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

It is not a de Polignac number, because 1980579 - 2¹ = 1980577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980577) 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, 17317 + ... + 17430.

It is an arithmetic number, because the mean of its divisors is an integer number (347480).

2^1980579 is an apocalyptic number.

1980579 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1980579 is a deficient number, since it is larger than the sum of its proper divisors (799261).

1980579 is a wasteful number, since it uses less digits than its factorization.

1980579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34769.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1980579 is about 1407.3304515998. The cubic root of 1980579 is about 125.5829623461.

The spelling of 1980579 in words is "one million, nine hundred eighty thousand, five hundred seventy-nine".