1980331 has 4 divisors (see below), whose sum is σ = 1991952. Its totient is φ = 1968712.

The previous prime is 1980317. The next prime is 1980337. The reversal of 1980331 is 1330891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1330891 = 569 ⋅2339.

It is a cyclic number.

It is not a de Polignac number, because 1980331 - 2¹⁷ = 1849259 is a prime.

It is a super-2 number, since 2×1980331² = 7843421739122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1980296 and 1980305.

It is not an unprimeable number, because it can be changed into a prime (1980337) 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, 5551 + ... + 5896.

It is an arithmetic number, because the mean of its divisors is an integer number (497988).

2^1980331 is an apocalyptic number.

1980331 is a deficient number, since it is larger than the sum of its proper divisors (11621).

1980331 is a wasteful number, since it uses less digits than its factorization.

1980331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11620.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1980331 is about 1407.2423387605. The cubic root of 1980331 is about 125.5777204657.

The spelling of 1980331 in words is "one million, nine hundred eighty thousand, three hundred thirty-one".