9423989 has 4 divisors (see below), whose sum is σ = 9543360. Its totient is φ = 9304620.

The previous prime is 9423971. The next prime is 9423991. The reversal of 9423989 is 9893249.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9893249 = 79 ⋅125231.

It is a de Polignac number, because none of the positive numbers 2^k-9423989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9423929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59567 + ... + 59724.

It is an arithmetic number, because the mean of its divisors is an integer number (2385840).

Almost surely, 2^9423989 is an apocalyptic number.

It is an amenable number.

9423989 is a deficient number, since it is larger than the sum of its proper divisors (119371).

9423989 is a wasteful number, since it uses less digits than its factorization.

9423989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119370.

The product of its digits is 139968, while the sum is 44.

The square root of 9423989 is about 3069.8516250790. The cubic root of 9423989 is about 211.2248077518.

The spelling of 9423989 in words is "nine million, four hundred twenty-three thousand, nine hundred eighty-nine".