438632143 has 2 divisors, whose sum is σ = 438632144. Its totient is φ = 438632142.

The previous prime is 438632101. The next prime is 438632191. The reversal of 438632143 is 341236834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438632143 - 2⁹ = 438631631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438632099 and 438632108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438632543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219316071 + 219316072.

It is an arithmetic number, because the mean of its divisors is an integer number (219316072).

Almost surely, 2^438632143 is an apocalyptic number.

438632143 is a deficient number, since it is larger than the sum of its proper divisors (1).

438632143 is an equidigital number, since it uses as much as digits as its factorization.

438632143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

The square root of 438632143 is about 20943.5465716769. The cubic root of 438632143 is about 759.8015080667.

Adding to 438632143 its reverse (341236834), we get a palindrome (779868977).

The spelling of 438632143 in words is "four hundred thirty-eight million, six hundred thirty-two thousand, one hundred forty-three".