438908342819 has 2 divisors, whose sum is σ = 438908342820. Its totient is φ = 438908342818.

The previous prime is 438908342801. The next prime is 438908342827. The reversal of 438908342819 is 918243809834.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438908342819 - 2⁸ = 438908342563 is a prime.

It is a super-2 number, since 2×438908342819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438908342839) 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, 219454171409 + 219454171410.

It is an arithmetic number, because the mean of its divisors is an integer number (219454171410).

Almost surely, 2^438908342819 is an apocalyptic number.

438908342819 is a deficient number, since it is larger than the sum of its proper divisors (1).

438908342819 is an equidigital number, since it uses as much as digits as its factorization.

438908342819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 438908342819 in words is "four hundred thirty-eight billion, nine hundred eight million, three hundred forty-two thousand, eight hundred nineteen".