1994909 has 8 divisors (see below), whose sum is σ = 2288448. Its totient is φ = 1703520.

The previous prime is 1994897. The next prime is 1994911. The reversal of 1994909 is 9094991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1994909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3374 + ... + 3920.

It is an arithmetic number, because the mean of its divisors is an integer number (286056).

2^1994909 is an apocalyptic number.

It is an amenable number.

1994909 is a deficient number, since it is larger than the sum of its proper divisors (293539).

1994909 is an equidigital number, since it uses as much as digits as its factorization.

1994909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 1994909 is about 1412.4124751644. The cubic root of 1994909 is about 125.8851098516.

The spelling of 1994909 in words is "one million, nine hundred ninety-four thousand, nine hundred nine".