1995653 has 6 divisors (see below), whose sum is σ = 2193702. Its totient is φ = 1814120.

The previous prime is 1995649. The next prime is 1995661. The reversal of 1995653 is 3565991.

It can be written as a sum of positive squares in only one way, i.e., 1162084 + 833569 = 1078^2 + 913^2 .

It is not a de Polignac number, because 1995653 - 2² = 1995649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8126 + ... + 8367.

It is an arithmetic number, because the mean of its divisors is an integer number (365617).

2^1995653 is an apocalyptic number.

It is an amenable number.

1995653 is a deficient number, since it is larger than the sum of its proper divisors (198049).

1995653 is a wasteful number, since it uses less digits than its factorization.

1995653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16515 (or 16504 counting only the distinct ones).

The product of its digits is 36450, while the sum is 38.

The square root of 1995653 is about 1412.6758297642. The cubic root of 1995653 is about 125.9007574962.

The spelling of 1995653 in words is "one million, nine hundred ninety-five thousand, six hundred fifty-three".