2400989 has 2 divisors, whose sum is σ = 2400990. Its totient is φ = 2400988.

The previous prime is 2400971. The next prime is 2401013. The reversal of 2400989 is 9890042.

2400989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1776889 + 624100 = 1333^2 + 790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2400989 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2400929) 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 as a sum of consecutive naturals, namely, 1200494 + 1200495.

It is an arithmetic number, because the mean of its divisors is an integer number (1200495).

2^2400989 is an apocalyptic number.

It is an amenable number.

2400989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400989 is an equidigital number, since it uses as much as digits as its factorization.

2400989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2400989 is about 1549.5125039831. The cubic root of 2400989 is about 133.9049783016.

The spelling of 2400989 in words is "two million, four hundred thousand, nine hundred eighty-nine".