438809881999 has 2 divisors, whose sum is σ = 438809882000. Its totient is φ = 438809881998.

The previous prime is 438809881981. The next prime is 438809882033. The reversal of 438809881999 is 999188908834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438809881999 - 2²⁹ = 438273011087 is a prime.

It is a super-2 number, since 2×438809881999² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438809881969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219404940999 + 219404941000.

It is an arithmetic number, because the mean of its divisors is an integer number (219404941000).

Almost surely, 2^438809881999 is an apocalyptic number.

438809881999 is a deficient number, since it is larger than the sum of its proper divisors (1).

438809881999 is an equidigital number, since it uses as much as digits as its factorization.

438809881999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322486272, while the sum is 76.

The spelling of 438809881999 in words is "four hundred thirty-eight billion, eight hundred nine million, eight hundred eighty-one thousand, nine hundred ninety-nine".