2146909 has 2 divisors, whose sum is σ = 2146910. Its totient is φ = 2146908.

The previous prime is 2146897. The next prime is 2146939. The reversal of 2146909 is 9096412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 521284 = 1275^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146909 - 2¹⁵ = 2114141 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2146939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073454 + 1073455.

It is an arithmetic number, because the mean of its divisors is an integer number (1073455).

2^2146909 is an apocalyptic number.

It is an amenable number.

2146909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146909 is an equidigital number, since it uses as much as digits as its factorization.

2146909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2146909 is about 1465.2334285021. The cubic root of 2146909 is about 129.0044066359.

The spelling of 2146909 in words is "two million, one hundred forty-six thousand, nine hundred nine".