5439273209 has 2 divisors, whose sum is σ = 5439273210. Its totient is φ = 5439273208.

The previous prime is 5439273163. The next prime is 5439273239. The reversal of 5439273209 is 9023729345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4101762025 + 1337511184 = 64045^2 + 36572^2 .

It is a cyclic number.

It is not a de Polignac number, because 5439273209 - 2¹² = 5439269113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5439273209.

It is not a weakly prime, because it can be changed into another prime (5439273239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2719636604 + 2719636605.

It is an arithmetic number, because the mean of its divisors is an integer number (2719636605).

Almost surely, 2^5439273209 is an apocalyptic number.

It is an amenable number.

5439273209 is a deficient number, since it is larger than the sum of its proper divisors (1).

5439273209 is an equidigital number, since it uses as much as digits as its factorization.

5439273209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 5439273209 is about 73751.4285217581. The cubic root of 5439273209 is about 1758.6535424281.

The spelling of 5439273209 in words is "five billion, four hundred thirty-nine million, two hundred seventy-three thousand, two hundred nine".