1995609 has 32 divisors (see below), whose sum is σ = 3400704. Its totient is φ = 1010880.

The previous prime is 1995607. The next prime is 1995611. The reversal of 1995609 is 9065991.

It is an interprime number because it is at equal distance from previous prime (1995607) and next prime (1995611).

It is not a de Polignac number, because 1995609 - 2¹ = 1995607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1995607) 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 31 ways as a sum of consecutive naturals, for example, 12162 + ... + 12324.

It is an arithmetic number, because the mean of its divisors is an integer number (106272).

2^1995609 is an apocalyptic number.

It is an amenable number.

1995609 is a deficient number, since it is larger than the sum of its proper divisors (1405095).

1995609 is a wasteful number, since it uses less digits than its factorization.

1995609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 1995609 is about 1412.6602563957. The cubic root of 1995609 is about 125.8998322060.

The spelling of 1995609 in words is "one million, nine hundred ninety-five thousand, six hundred nine".