1980513 has 6 divisors (see below), whose sum is σ = 2860754. Its totient is φ = 1320336.

The previous prime is 1980491. The next prime is 1980521. The reversal of 1980513 is 3150891.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 42849 = 1392^2 + 207^2 .

It is not a de Polignac number, because 1980513 - 2¹⁰ = 1979489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110020 + ... + 110037.

2^1980513 is an apocalyptic number.

It is an amenable number.

1980513 is a deficient number, since it is larger than the sum of its proper divisors (880241).

1980513 is a wasteful number, since it uses less digits than its factorization.

1980513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220063 (or 220060 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1980513 is about 1407.3070027538. The cubic root of 1980513 is about 125.5815673722.

The spelling of 1980513 in words is "one million, nine hundred eighty thousand, five hundred thirteen".