249900009 has 8 divisors (see below), whose sum is σ = 333532992. Its totient is φ = 166433520.

The previous prime is 249899999. The next prime is 249900011. The reversal of 249900009 is 900009942.

It is a happy number.

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

It is not a de Polignac number, because 249900009 - 2⁸ = 249899753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249900029) 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 7 ways as a sum of consecutive naturals, for example, 38077 + ... + 44154.

It is an arithmetic number, because the mean of its divisors is an integer number (41691624).

Almost surely, 2^249900009 is an apocalyptic number.

It is an amenable number.

249900009 is a deficient number, since it is larger than the sum of its proper divisors (83632983).

249900009 is a wasteful number, since it uses less digits than its factorization.

249900009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83247.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 249900009 is about 15808.2259915526. The cubic root of 249900009 is about 629.8765265705.

The spelling of 249900009 in words is "two hundred forty-nine million, nine hundred thousand, nine".