438782989 has 2 divisors, whose sum is σ = 438782990. Its totient is φ = 438782988.

The previous prime is 438782977. The next prime is 438783001. The reversal of 438782989 is 989287834.

It is a balanced prime because it is at equal distance from previous prime (438782977) and next prime (438783001).

It can be written as a sum of positive squares in only one way, i.e., 410872900 + 27910089 = 20270^2 + 5283^2 .

It is a cyclic number.

It is not a de Polignac number, because 438782989 - 2⁵ = 438782957 is a prime.

It is a super-2 number, since 2×438782989² = 385061022871548242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438782969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219391494 + 219391495.

It is an arithmetic number, because the mean of its divisors is an integer number (219391495).

Almost surely, 2^438782989 is an apocalyptic number.

It is an amenable number.

438782989 is a deficient number, since it is larger than the sum of its proper divisors (1).

438782989 is an equidigital number, since it uses as much as digits as its factorization.

438782989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 58.

The square root of 438782989 is about 20947.1475146379. The cubic root of 438782989 is about 759.8885968981. Note that the first 3 decimals are identical.

The spelling of 438782989 in words is "four hundred thirty-eight million, seven hundred eighty-two thousand, nine hundred eighty-nine".