1906823149 has 24 divisors (see below), whose sum is σ = 2431171904. Its totient is φ = 1463616000.

The previous prime is 1906823143. The next prime is 1906823161. The reversal of 1906823149 is 9413286091.

It is a happy number.

It is not a de Polignac number, because 1906823149 - 2³ = 1906823141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906823141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39949 + ... + 73549.

Almost surely, 2^1906823149 is an apocalyptic number.

It is an amenable number.

1906823149 is a deficient number, since it is larger than the sum of its proper divisors (524348755).

1906823149 is a wasteful number, since it uses less digits than its factorization.

1906823149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33697 (or 33686 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1906823149 is about 43667.1861813880. The cubic root of 1906823149 is about 1240.0431716239.

The spelling of 1906823149 in words is "one billion, nine hundred six million, eight hundred twenty-three thousand, one hundred forty-nine".