249066909 has 48 divisors (see below), whose sum is σ = 447318144. Its totient is φ = 130032000.

The previous prime is 249066899. The next prime is 249066911. The reversal of 249066909 is 909660942.

It is not a de Polignac number, because 249066909 - 2¹³ = 249058717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249066409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81214 + ... + 84224.

It is an arithmetic number, because the mean of its divisors is an integer number (9319128).

Almost surely, 2^249066909 is an apocalyptic number.

It is an amenable number.

249066909 is a deficient number, since it is larger than the sum of its proper divisors (198251235).

249066909 is a wasteful number, since it uses less digits than its factorization.

249066909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138 (or 3135 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 249066909 is about 15781.8537884496. The cubic root of 249066909 is about 629.1758005155.

The spelling of 249066909 in words is "two hundred forty-nine million, sixty-six thousand, nine hundred nine".