4373989 has 2 divisors, whose sum is σ = 4373990. Its totient is φ = 4373988.

The previous prime is 4373987. The next prime is 4374001. The reversal of 4373989 is 9893734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3833764 + 540225 = 1958^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 4373989 - 2¹ = 4373987 is a prime.

Together with 4373987, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 4¹¹ + 3⁶ + 7³ + 3¹¹ + 9³ + 8 + 9³ .

4373989 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4373987) 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, 2186994 + 2186995.

It is an arithmetic number, because the mean of its divisors is an integer number (2186995).

Almost surely, 2^4373989 is an apocalyptic number.

It is an amenable number.

4373989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4373989 is an equidigital number, since it uses as much as digits as its factorization.

4373989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 4373989 is about 2091.4083771468. The cubic root of 4373989 is about 163.5407162606.

The spelling of 4373989 in words is "four million, three hundred seventy-three thousand, nine hundred eighty-nine".