1994919 has 4 divisors (see below), whose sum is σ = 2659896. Its totient is φ = 1329944.

The previous prime is 1994911. The next prime is 1994947. The reversal of 1994919 is 9194991.

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 1994919 - 2³ = 1994911 is a prime.

It is a super-2 number, since 2×1994919² = 7959403633122, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332484 + ... + 332489.

It is an arithmetic number, because the mean of its divisors is an integer number (664974).

2^1994919 is an apocalyptic number.

1994919 is a deficient number, since it is larger than the sum of its proper divisors (664977).

1994919 is an equidigital number, since it uses as much as digits as its factorization.

1994919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664976.

The product of its digits is 26244, while the sum is 42.

The square root of 1994919 is about 1412.4160152023. The cubic root of 1994919 is about 125.8853201952.

The spelling of 1994919 in words is "one million, nine hundred ninety-four thousand, nine hundred nineteen".