438129667 has 2 divisors, whose sum is σ = 438129668. Its totient is φ = 438129666.

The previous prime is 438129613. The next prime is 438129689. The reversal of 438129667 is 766921834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438129667 - 2⁷ = 438129539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438123667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219064833 + 219064834.

It is an arithmetic number, because the mean of its divisors is an integer number (219064834).

Almost surely, 2^438129667 is an apocalyptic number.

438129667 is a deficient number, since it is larger than the sum of its proper divisors (1).

438129667 is an equidigital number, since it uses as much as digits as its factorization.

438129667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 438129667 is about 20931.5471716737. The cubic root of 438129667 is about 759.5112664559.

The spelling of 438129667 in words is "four hundred thirty-eight million, one hundred twenty-nine thousand, six hundred sixty-seven".