1995819 has 12 divisors (see below), whose sum is σ = 3095784. Its totient is φ = 1140384.

The previous prime is 1995797. The next prime is 1995827. The reversal of 1995819 is 9185991.

It is not a de Polignac number, because 1995819 - 2⁵ = 1995787 is a prime.

It is a super-2 number, since 2×1995819² = 7966586961522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1995869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6642 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (257982).

2^1995819 is an apocalyptic number.

1995819 is a deficient number, since it is larger than the sum of its proper divisors (1099965).

1995819 is a wasteful number, since it uses less digits than its factorization.

1995819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13594 (or 13587 counting only the distinct ones).

The product of its digits is 29160, while the sum is 42.

The square root of 1995819 is about 1412.7345822907. The cubic root of 1995819 is about 125.9042482410.

The spelling of 1995819 in words is "one million, nine hundred ninety-five thousand, eight hundred nineteen".