1980359 has 4 divisors (see below), whose sum is σ = 1993800. Its totient is φ = 1966920.

The previous prime is 1980353. The next prime is 1980361. The reversal of 1980359 is 9530891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1980359 - 2⁴ = 1980343 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 (1980353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (498450).

2^1980359 is an apocalyptic number.

1980359 is a deficient number, since it is larger than the sum of its proper divisors (13441).

1980359 is a wasteful number, since it uses less digits than its factorization.

1980359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1980359 is about 1407.2522872605. The cubic root of 1980359 is about 125.5783123128.

The spelling of 1980359 in words is "one million, nine hundred eighty thousand, three hundred fifty-nine".