4391049869 has 2 divisors, whose sum is σ = 4391049870. Its totient is φ = 4391049868.

The previous prime is 4391049847. The next prime is 4391049881. The reversal of 4391049869 is 9689401934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3458968969 + 932080900 = 58813^2 + 30530^2 .

It is a cyclic number.

It is not a de Polignac number, because 4391049869 - 2⁸ = 4391049613 is a prime.

It is a super-2 number, since 2×4391049869² = 38562637904089834322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4391049869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4391049809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195524934 + 2195524935.

It is an arithmetic number, because the mean of its divisors is an integer number (2195524935).

Almost surely, 2^4391049869 is an apocalyptic number.

It is an amenable number.

4391049869 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391049869 is an equidigital number, since it uses as much as digits as its factorization.

4391049869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 4391049869 is about 66264.9973138157. The cubic root of 4391049869 is about 1637.5307214406.

The spelling of 4391049869 in words is "four billion, three hundred ninety-one million, forty-nine thousand, eight hundred sixty-nine".