431643205234987 has 2 divisors, whose sum is σ = 431643205234988. Its totient is φ = 431643205234986.

The previous prime is 431643205234919. The next prime is 431643205235059. The reversal of 431643205234987 is 789432502346134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431643205234987 - 2⁷ = 431643205234859 is a prime.

It is not a weakly prime, because it can be changed into another prime (431643205234907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215821602617493 + 215821602617494.

It is an arithmetic number, because the mean of its divisors is an integer number (215821602617494).

It is a 1-persistent number, because it is pandigital, but 2⋅431643205234987 = 863286410469974 is not.

Almost surely, 2^{431643205234987} is an apocalyptic number.

431643205234987 is a deficient number, since it is larger than the sum of its proper divisors (1).

431643205234987 is an equidigital number, since it uses as much as digits as its factorization.

431643205234987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104509440, while the sum is 61.

The spelling of 431643205234987 in words is "four hundred thirty-one trillion, six hundred forty-three billion, two hundred five million, two hundred thirty-four thousand, nine hundred eighty-seven".