1968399 has 6 divisors (see below), whose sum is σ = 2843256. Its totient is φ = 1312260.

The previous prime is 1968391. The next prime is 1968401. The reversal of 1968399 is 9938691.

It is not a de Polignac number, because 1968399 - 2³ = 1968391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968391) 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, 109347 + ... + 109364.

It is an arithmetic number, because the mean of its divisors is an integer number (473876).

2^1968399 is an apocalyptic number.

1968399 is a deficient number, since it is larger than the sum of its proper divisors (874857).

1968399 is a wasteful number, since it uses less digits than its factorization.

1968399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218717 (or 218714 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1968399 is about 1402.9964362036. The cubic root of 1968399 is about 125.3249996031.

The spelling of 1968399 in words is "one million, nine hundred sixty-eight thousand, three hundred ninety-nine".