1980437 has 4 divisors (see below), whose sum is σ = 1983276. Its totient is φ = 1977600.

The previous prime is 1980431. The next prime is 1980443. The reversal of 1980437 is 7340891.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1980431) and next prime (1980443).

It can be written as a sum of positive squares in 2 ways, for example, as 1825201 + 155236 = 1351^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980437 - 2¹⁰ = 1979413 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 (1980431) 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, 437 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (495819).

2^1980437 is an apocalyptic number.

It is an amenable number.

1980437 is a deficient number, since it is larger than the sum of its proper divisors (2839).

1980437 is a wasteful number, since it uses less digits than its factorization.

1980437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1980437 is about 1407.2800005685. The cubic root of 1980437 is about 125.5799610004.

The spelling of 1980437 in words is "one million, nine hundred eighty thousand, four hundred thirty-seven".