1980469 has 2 divisors, whose sum is σ = 1980470. Its totient is φ = 1980468.

The previous prime is 1980443. The next prime is 1980491. The reversal of 1980469 is 9640891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 877969 = 1050^2 + 937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980469 - 2¹¹ = 1978421 is a prime.

It is a super-2 number, since 2×1980469² = 7844514919922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980409) 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 as a sum of consecutive naturals, namely, 990234 + 990235.

It is an arithmetic number, because the mean of its divisors is an integer number (990235).

2^1980469 is an apocalyptic number.

1980469 is the 813-rd hex number.

It is an amenable number.

1980469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980469 is an equidigital number, since it uses as much as digits as its factorization.

1980469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1980469 is about 1407.2913699728. The cubic root of 1980469 is about 125.5806373725.

The spelling of 1980469 in words is "one million, nine hundred eighty thousand, four hundred sixty-nine".