249969906 has 24 divisors (see below), whose sum is σ = 542175660. Its totient is φ = 83234976.

The previous prime is 249969901. The next prime is 249969917. The reversal of 249969906 is 609969942.

249969906 is a `hidden beast` number, since 2 + 499 + 69 + 90 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 243079281 + 6890625 = 15591^2 + 2625^2 .

It is not an unprimeable number, because it can be changed into a prime (249969901) 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 11 ways as a sum of consecutive naturals, for example, 11380 + ... + 25088.

Almost surely, 2^249969906 is an apocalyptic number.

249969906 is an abundant number, since it is smaller than the sum of its proper divisors (292205754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249969906 is a wasteful number, since it uses less digits than its factorization.

249969906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14730 (or 14727 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 249969906 is about 15810.4366163620. The cubic root of 249969906 is about 629.9352465571.

The spelling of 249969906 in words is "two hundred forty-nine million, nine hundred sixty-nine thousand, nine hundred six".