550394121 has 4 divisors (see below), whose sum is σ = 733858832. Its totient is φ = 366929412.

The previous prime is 550394099. The next prime is 550394149. The reversal of 550394121 is 121493055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 550394121 - 2¹⁰ = 550393097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550394171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91732351 + ... + 91732356.

It is an arithmetic number, because the mean of its divisors is an integer number (183464708).

Almost surely, 2^550394121 is an apocalyptic number.

It is an amenable number.

550394121 is a deficient number, since it is larger than the sum of its proper divisors (183464711).

550394121 is a wasteful number, since it uses less digits than its factorization.

550394121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183464710.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 550394121 is about 23460.4799823022. The cubic root of 550394121 is about 819.5169279449.

The spelling of 550394121 in words is "five hundred fifty million, three hundred ninety-four thousand, one hundred twenty-one".