2190544309 has 2 divisors, whose sum is σ = 2190544310. Its totient is φ = 2190544308.

The previous prime is 2190544283. The next prime is 2190544331. The reversal of 2190544309 is 9034450912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2181824100 + 8720209 = 46710^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190544309 - 2¹¹ = 2190542261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2190544379) 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 as a sum of consecutive naturals, namely, 1095272154 + 1095272155.

It is an arithmetic number, because the mean of its divisors is an integer number (1095272155).

Almost surely, 2^2190544309 is an apocalyptic number.

It is an amenable number.

2190544309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190544309 is an equidigital number, since it uses as much as digits as its factorization.

2190544309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2190544309 is about 46803.2510516097. The cubic root of 2190544309 is about 1298.7254389542.

The spelling of 2190544309 in words is "two billion, one hundred ninety million, five hundred forty-four thousand, three hundred nine".