4331989 has 2 divisors, whose sum is σ = 4331990. Its totient is φ = 4331988.

The previous prime is 4331983. The next prime is 4332001. The reversal of 4331989 is 9891334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4284900 + 47089 = 2070^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 4331989 - 2⁷ = 4331861 is a prime.

It is a super-2 number, since 2×4331989² = 37532257392242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4331983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2165994 + 2165995.

It is an arithmetic number, because the mean of its divisors is an integer number (2165995).

Almost surely, 2^4331989 is an apocalyptic number.

It is an amenable number.

4331989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4331989 is an equidigital number, since it uses as much as digits as its factorization.

4331989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 4331989 is about 2081.3430759968. The cubic root of 4331989 is about 163.0155805800.

The spelling of 4331989 in words is "four million, three hundred thirty-one thousand, nine hundred eighty-nine".