1968667 has 4 divisors (see below), whose sum is σ = 1975680. Its totient is φ = 1961656.

The previous prime is 1968641. The next prime is 1968679. The reversal of 1968667 is 7668691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1968667 - 2⁷ = 1968539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3067 + ... + 3652.

It is an arithmetic number, because the mean of its divisors is an integer number (493920).

2^1968667 is an apocalyptic number.

1968667 is a deficient number, since it is larger than the sum of its proper divisors (7013).

1968667 is an equidigital number, since it uses as much as digits as its factorization.

1968667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012.

The product of its digits is 108864, while the sum is 43.

The square root of 1968667 is about 1403.0919428177. The cubic root of 1968667 is about 125.3306870637.

It can be divided in two parts, 19 and 68667, that added together give a palindrome (68686).

The spelling of 1968667 in words is "one million, nine hundred sixty-eight thousand, six hundred sixty-seven".