1995667 has 4 divisors (see below), whose sum is σ = 2038176. Its totient is φ = 1953160.

The previous prime is 1995661. The next prime is 1995677. The reversal of 1995667 is 7665991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7665991 = 557 ⋅13763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995667 is a prime.

It is a Duffinian number.

1995667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1995661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21184 + ... + 21277.

It is an arithmetic number, because the mean of its divisors is an integer number (509544).

2^1995667 is an apocalyptic number.

1995667 is a deficient number, since it is larger than the sum of its proper divisors (42509).

1995667 is an equidigital number, since it uses as much as digits as its factorization.

1995667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42508.

The product of its digits is 102060, while the sum is 43.

The square root of 1995667 is about 1412.6807848909. The cubic root of 1995667 is about 125.9010519038.

It can be divided in two parts, 1995 and 667, that added together give a palindrome (2662).

The spelling of 1995667 in words is "one million, nine hundred ninety-five thousand, six hundred sixty-seven".