400434243444239 has 2 divisors, whose sum is σ = 400434243444240. Its totient is φ = 400434243444238.

The previous prime is 400434243444217. The next prime is 400434243444247. The reversal of 400434243444239 is 932444342434004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400434243444239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400434243444289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200217121722119 + 200217121722120.

It is an arithmetic number, because the mean of its divisors is an integer number (200217121722120).

Almost surely, 2^{400434243444239} is an apocalyptic number.

400434243444239 is a deficient number, since it is larger than the sum of its proper divisors (1).

400434243444239 is an equidigital number, since it uses as much as digits as its factorization.

400434243444239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15925248, while the sum is 50.

The spelling of 400434243444239 in words is "four hundred trillion, four hundred thirty-four billion, two hundred forty-three million, four hundred forty-four thousand, two hundred thirty-nine".