5490051209 has 4 divisors (see below), whose sum is σ = 5505604116. Its totient is φ = 5474498304.

The previous prime is 5490051139. The next prime is 5490051223. The reversal of 5490051209 is 9021500945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1583801209 + 3906250000 = 39797^2 + 62500^2 .

It is a cyclic number.

It is not a de Polignac number, because 5490051209 - 2¹⁶ = 5489985673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5490051409) 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, 7775924 + ... + 7776629.

It is an arithmetic number, because the mean of its divisors is an integer number (1376401029).

Almost surely, 2^5490051209 is an apocalyptic number.

It is an amenable number.

5490051209 is a deficient number, since it is larger than the sum of its proper divisors (15552907).

5490051209 is a wasteful number, since it uses less digits than its factorization.

5490051209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15552906.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 5490051209 is about 74094.8797758658. The cubic root of 5490051209 is about 1764.1092011015.

The spelling of 5490051209 in words is "five billion, four hundred ninety million, fifty-one thousand, two hundred nine".