438069139 has 2 divisors, whose sum is σ = 438069140. Its totient is φ = 438069138.

The previous prime is 438069113. The next prime is 438069161. The reversal of 438069139 is 931960834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438069139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438069095 and 438069104.

It is not a weakly prime, because it can be changed into another prime (438064139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219034569 + 219034570.

It is an arithmetic number, because the mean of its divisors is an integer number (219034570).

Almost surely, 2^438069139 is an apocalyptic number.

438069139 is a deficient number, since it is larger than the sum of its proper divisors (1).

438069139 is an equidigital number, since it uses as much as digits as its factorization.

438069139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 438069139 is about 20930.1012658802. The cubic root of 438069139 is about 759.4762891280.

The spelling of 438069139 in words is "four hundred thirty-eight million, sixty-nine thousand, one hundred thirty-nine".