1995399 has 24 divisors (see below), whose sum is σ = 3469440. Its totient is φ = 1079568.

The previous prime is 1995391. The next prime is 1995421. The reversal of 1995399 is 9935991.

It is not a de Polignac number, because 1995399 - 2³ = 1995391 is a prime.

1995399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364 + ... + 2030.

It is an arithmetic number, because the mean of its divisors is an integer number (144560).

2^1995399 is an apocalyptic number.

1995399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1995399 is a deficient number, since it is larger than the sum of its proper divisors (1474041).

1995399 is a wasteful number, since it uses less digits than its factorization.

1995399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1696 counting only the distinct ones).

The product of its digits is 98415, while the sum is 45.

The square root of 1995399 is about 1412.5859265900. The cubic root of 1995399 is about 125.8954158613.

The spelling of 1995399 in words is "one million, nine hundred ninety-five thousand, three hundred ninety-nine".