438289685429 has 2 divisors, whose sum is σ = 438289685430. Its totient is φ = 438289685428.

The previous prime is 438289685413. The next prime is 438289685443. The reversal of 438289685429 is 924586982834.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274499501329 + 163790184100 = 523927^2 + 404710^2 .

It is a cyclic number.

It is not a de Polignac number, because 438289685429 - 2⁴ = 438289685413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438289685459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219144842714 + 219144842715.

It is an arithmetic number, because the mean of its divisors is an integer number (219144842715).

Almost surely, 2^438289685429 is an apocalyptic number.

It is an amenable number.

438289685429 is a deficient number, since it is larger than the sum of its proper divisors (1).

438289685429 is an equidigital number, since it uses as much as digits as its factorization.

438289685429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238878720, while the sum is 68.

The spelling of 438289685429 in words is "four hundred thirty-eight billion, two hundred eighty-nine million, six hundred eighty-five thousand, four hundred twenty-nine".