1000667 has 2 divisors, whose sum is σ = 1000668. Its totient is φ = 1000666.

The previous prime is 1000651. The next prime is 1000669. The reversal of 1000667 is 7660001.

It is a strong prime.

It is an emirp because it is prime and its reverse (7660001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000667 - 2⁴ = 1000651 is a prime.

Together with 1000669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1000669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500333 + 500334.

It is an arithmetic number, because the mean of its divisors is an integer number (500334).

2^1000667 is an apocalyptic number.

1000667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000667 is an equidigital number, since it uses as much as digits as its factorization.

1000667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1000667 is about 1000.3334444074. Note that the first 3 decimals coincide. The cubic root of 1000667 is about 100.0222283920.

Adding to 1000667 its reverse (7660001), we get a palindrome (8660668).

The spelling of 1000667 in words is "one million, six hundred sixty-seven", and thus it is an aban number.