240400404239 has 2 divisors, whose sum is σ = 240400404240. Its totient is φ = 240400404238.

The previous prime is 240400404217. The next prime is 240400404241. The reversal of 240400404239 is 932404004042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240400404239 - 2⁸ = 240400403983 is a prime.

It is a Sophie Germain prime.

Together with 240400404241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240400404289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120200202119 + 120200202120.

It is an arithmetic number, because the mean of its divisors is an integer number (120200202120).

Almost surely, 2^240400404239 is an apocalyptic number.

240400404239 is a deficient number, since it is larger than the sum of its proper divisors (1).

240400404239 is an equidigital number, since it uses as much as digits as its factorization.

240400404239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 240400404239 in words is "two hundred forty billion, four hundred million, four hundred four thousand, two hundred thirty-nine".