8432989 has 4 divisors (see below), whose sum is σ = 8592156. Its totient is φ = 8273824.

The previous prime is 8432987. The next prime is 8432993. The reversal of 8432989 is 9892348.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 5040025 = 1842^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 8432989 - 2¹ = 8432987 is a prime.

It is a super-2 number, since 2×8432989² = 142230606948242, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8³ + 4⁷ + 3⁹ + 2²³ + 9³ + 8³ + 9⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8432981) 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 in 3 ways as a sum of consecutive naturals, for example, 79504 + ... + 79609.

It is an arithmetic number, because the mean of its divisors is an integer number (2148039).

Almost surely, 2^8432989 is an apocalyptic number.

It is an amenable number.

8432989 is a deficient number, since it is larger than the sum of its proper divisors (159167).

8432989 is a wasteful number, since it uses less digits than its factorization.

8432989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159166.

The product of its digits is 124416, while the sum is 43.

The square root of 8432989 is about 2903.9609157149. The cubic root of 8432989 is about 203.5450340722.

The spelling of 8432989 in words is "eight million, four hundred thirty-two thousand, nine hundred eighty-nine".