204249749 has 8 divisors (see below), whose sum is σ = 225322560. Its totient is φ = 183594400.

The previous prime is 204249739. The next prime is 204249767. The reversal of 204249749 is 947942402.

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

It is a de Polignac number, because none of the positive numbers 2^k-204249749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204249739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103337 + ... + 105294.

It is an arithmetic number, because the mean of its divisors is an integer number (28165320).

Almost surely, 2^204249749 is an apocalyptic number.

It is an amenable number.

204249749 is a deficient number, since it is larger than the sum of its proper divisors (21072811).

204249749 is a wasteful number, since it uses less digits than its factorization.

204249749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208731.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 204249749 is about 14291.5971465753. The cubic root of 204249749 is about 588.9166647250.

The spelling of 204249749 in words is "two hundred four million, two hundred forty-nine thousand, seven hundred forty-nine".