438667 has 2 divisors, whose sum is σ = 438668. Its totient is φ = 438666.

The previous prime is 438661. The next prime is 438671. The reversal of 438667 is 766834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438667 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (438661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219333 + 219334.

It is an arithmetic number, because the mean of its divisors is an integer number (219334).

2⁴³⁸⁶⁶⁷ is an apocalyptic number.

438667 is a deficient number, since it is larger than the sum of its proper divisors (1).

438667 is an equidigital number, since it uses as much as digits as its factorization.

438667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 438667 is about 662.3194093487. The cubic root of 438667 is about 75.9821634042.

The spelling of 438667 in words is "four hundred thirty-eight thousand, six hundred sixty-seven".