1894399 has 4 divisors (see below), whose sum is σ = 2040136. Its totient is φ = 1748664.

The previous prime is 1894397. The next prime is 1894411. The reversal of 1894399 is 9934981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1894399 - 2¹ = 1894397 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2 and base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72849 + ... + 72874.

It is an arithmetic number, because the mean of its divisors is an integer number (510034).

2^1894399 is an apocalyptic number.

1894399 is a deficient number, since it is larger than the sum of its proper divisors (145737).

1894399 is a wasteful number, since it uses less digits than its factorization.

1894399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145736.

The product of its digits is 69984, while the sum is 43.

The square root of 1894399 is about 1376.3716794529. The cubic root of 1894399 is about 123.7344081298.

The spelling of 1894399 in words is "one million, eight hundred ninety-four thousand, three hundred ninety-nine".