4391209049 has 2 divisors, whose sum is σ = 4391209050. Its totient is φ = 4391209048.

The previous prime is 4391209001. The next prime is 4391209127. The reversal of 4391209049 is 9409021934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4256649049 + 134560000 = 65243^2 + 11600^2 .

It is a cyclic number.

It is not a de Polignac number, because 4391209049 - 2¹² = 4391204953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4391208997 and 4391209015.

It is not a weakly prime, because it can be changed into another prime (4391239049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195604524 + 2195604525.

It is an arithmetic number, because the mean of its divisors is an integer number (2195604525).

Almost surely, 2^4391209049 is an apocalyptic number.

It is an amenable number.

4391209049 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391209049 is an equidigital number, since it uses as much as digits as its factorization.

4391209049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 4391209049 is about 66266.1983895259. The cubic root of 4391209049 is about 1637.5505085833.

The spelling of 4391209049 in words is "four billion, three hundred ninety-one million, two hundred nine thousand, forty-nine".