864242429 has 2 divisors, whose sum is σ = 864242430. Its totient is φ = 864242428.

The previous prime is 864242387. The next prime is 864242437. The reversal of 864242429 is 924242468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864242404 + 25 = 29398^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864242429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864242129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432121214 + 432121215.

It is an arithmetic number, because the mean of its divisors is an integer number (432121215).

Almost surely, 2^864242429 is an apocalyptic number.

It is an amenable number.

864242429 is a deficient number, since it is larger than the sum of its proper divisors (1).

864242429 is an equidigital number, since it uses as much as digits as its factorization.

864242429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 41.

The square root of 864242429 is about 29398.0004251990. Note that the first 3 decimals coincide. The cubic root of 864242429 is about 952.5297043434.

The spelling of 864242429 in words is "eight hundred sixty-four million, two hundred forty-two thousand, four hundred twenty-nine".