240506689 has 2 divisors, whose sum is σ = 240506690. Its totient is φ = 240506688.

The previous prime is 240506687. The next prime is 240506723. The reversal of 240506689 is 986605042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209236225 + 31270464 = 14465^2 + 5592^2 .

It is a cyclic number.

It is not a de Polignac number, because 240506689 - 2¹ = 240506687 is a prime.

Together with 240506687, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240506687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120253344 + 120253345.

It is an arithmetic number, because the mean of its divisors is an integer number (120253345).

Almost surely, 2^240506689 is an apocalyptic number.

It is an amenable number.

240506689 is a deficient number, since it is larger than the sum of its proper divisors (1).

240506689 is an equidigital number, since it uses as much as digits as its factorization.

240506689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 240506689 is about 15508.2780797869. The cubic root of 240506689 is about 621.8835272654.

The spelling of 240506689 in words is "two hundred forty million, five hundred six thousand, six hundred eighty-nine".