550149909 has 8 divisors (see below), whose sum is σ = 735577920. Its totient is φ = 365744256.

The previous prime is 550149893. The next prime is 550149913. The reversal of 550149909 is 909941055.

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 550149909 - 2⁴ = 550149893 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550149409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254332 + ... + 256485.

It is an arithmetic number, because the mean of its divisors is an integer number (91947240).

Almost surely, 2^550149909 is an apocalyptic number.

It is an amenable number.

550149909 is a deficient number, since it is larger than the sum of its proper divisors (185428011).

550149909 is a wasteful number, since it uses less digits than its factorization.

550149909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511179.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 550149909 is about 23455.2746519839. The cubic root of 550149909 is about 819.3957024037.

The spelling of 550149909 in words is "five hundred fifty million, one hundred forty-nine thousand, nine hundred nine".