2423989 has 4 divisors (see below), whose sum is σ = 2432556. Its totient is φ = 2415424.

The previous prime is 2423969. The next prime is 2423999. The reversal of 2423989 is 9893242.

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 2102500 + 321489 = 1450^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 2423989 - 2¹⁹ = 1899701 is a prime.

It is a Duffinian number.

2423989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2423909) 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 in 3 ways as a sum of consecutive naturals, for example, 3844 + ... + 4429.

It is an arithmetic number, because the mean of its divisors is an integer number (608139).

2^2423989 is an apocalyptic number.

It is an amenable number.

2423989 is a deficient number, since it is larger than the sum of its proper divisors (8567).

2423989 is an equidigital number, since it uses as much as digits as its factorization.

2423989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566.

The product of its digits is 31104, while the sum is 37.

The square root of 2423989 is about 1556.9165038627. The cubic root of 2423989 is about 134.3311960341.

The spelling of 2423989 in words is "two million, four hundred twenty-three thousand, nine hundred eighty-nine".