240918989 has 2 divisors, whose sum is σ = 240918990. Its totient is φ = 240918988.

The previous prime is 240918967. The next prime is 240919001. The reversal of 240918989 is 989819042.

It is a happy number.

240918989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176438089 + 64480900 = 13283^2 + 8030^2 .

It is a cyclic number.

It is not a de Polignac number, because 240918989 - 2¹⁶ = 240853453 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 (240918929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120459494 + 120459495.

It is an arithmetic number, because the mean of its divisors is an integer number (120459495).

Almost surely, 2^240918989 is an apocalyptic number.

It is an amenable number.

240918989 is a deficient number, since it is larger than the sum of its proper divisors (1).

240918989 is an equidigital number, since it uses as much as digits as its factorization.

240918989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 240918989 is about 15521.5652883335. The cubic root of 240918989 is about 622.2386888369.

The spelling of 240918989 in words is "two hundred forty million, nine hundred eighteen thousand, nine hundred eighty-nine".