1995813 has 16 divisors (see below), whose sum is σ = 2979840. Its totient is φ = 1320192.

The previous prime is 1995797. The next prime is 1995827. The reversal of 1995813 is 3185991.

It is a happy number.

It is not a de Polignac number, because 1995813 - 2⁴ = 1995797 is a prime.

It is a super-3 number, since 3×1995813³ = 23849583337235498391, which contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5020 + ... + 5402.

It is an arithmetic number, because the mean of its divisors is an integer number (186240).

2^1995813 is an apocalyptic number.

It is an amenable number.

1995813 is a deficient number, since it is larger than the sum of its proper divisors (984027).

1995813 is a wasteful number, since it uses less digits than its factorization.

1995813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 579 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1995813 is about 1412.7324587479. The cubic root of 1995813 is about 125.9041220729.

The spelling of 1995813 in words is "one million, nine hundred ninety-five thousand, eight hundred thirteen".