438668171 has 2 divisors, whose sum is σ = 438668172. Its totient is φ = 438668170.

The previous prime is 438668129. The next prime is 438668177. The reversal of 438668171 is 171866834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438668171 - 2²² = 434473867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438668177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219334085 + 219334086.

It is an arithmetic number, because the mean of its divisors is an integer number (219334086).

Almost surely, 2^438668171 is an apocalyptic number.

438668171 is a deficient number, since it is larger than the sum of its proper divisors (1).

438668171 is an equidigital number, since it uses as much as digits as its factorization.

438668171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 438668171 is about 20944.4066757691. The cubic root of 438668171 is about 759.8223101440.

The spelling of 438668171 in words is "four hundred thirty-eight million, six hundred sixty-eight thousand, one hundred seventy-one".