1806949 has 8 divisors (see below), whose sum is σ = 1899072. Its totient is φ = 1716000.

The previous prime is 1806943. The next prime is 1806953. The reversal of 1806949 is 9496081.

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

It is a cyclic number.

It is not a de Polignac number, because 1806949 - 2³ = 1806941 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 (1806941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5617 + ... + 5929.

It is an arithmetic number, because the mean of its divisors is an integer number (237384).

2^1806949 is an apocalyptic number.

It is an amenable number.

1806949 is a deficient number, since it is larger than the sum of its proper divisors (92123).

1806949 is a wasteful number, since it uses less digits than its factorization.

With its successor (1806950) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (587).

1806949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1806949 is about 1344.2280312507. The cubic root of 1806949 is about 121.8003767594.

The spelling of 1806949 in words is "one million, eight hundred six thousand, nine hundred forty-nine".