240042389 has 2 divisors, whose sum is σ = 240042390. Its totient is φ = 240042388.

The previous prime is 240042377. The next prime is 240042403. The reversal of 240042389 is 983240042.

240042389 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., 214388164 + 25654225 = 14642^2 + 5065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240042389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240042289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120021194 + 120021195.

It is an arithmetic number, because the mean of its divisors is an integer number (120021195).

Almost surely, 2^240042389 is an apocalyptic number.

It is an amenable number.

240042389 is a deficient number, since it is larger than the sum of its proper divisors (1).

240042389 is an equidigital number, since it uses as much as digits as its factorization.

240042389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 240042389 is about 15493.3014235185. The cubic root of 240042389 is about 621.4830858366.

The spelling of 240042389 in words is "two hundred forty million, forty-two thousand, three hundred eighty-nine".