438621477139 has 2 divisors, whose sum is σ = 438621477140. Its totient is φ = 438621477138.

The previous prime is 438621477059. The next prime is 438621477149. The reversal of 438621477139 is 931774126834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438621477139 - 2⁷ = 438621477011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438621477139.

It is not a weakly prime, because it can be changed into another prime (438621477149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219310738569 + 219310738570.

It is an arithmetic number, because the mean of its divisors is an integer number (219310738570).

Almost surely, 2^438621477139 is an apocalyptic number.

438621477139 is a deficient number, since it is larger than the sum of its proper divisors (1).

438621477139 is an equidigital number, since it uses as much as digits as its factorization.

438621477139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The spelling of 438621477139 in words is "four hundred thirty-eight billion, six hundred twenty-one million, four hundred seventy-seven thousand, one hundred thirty-nine".