2049791669 has 2 divisors, whose sum is σ = 2049791670. Its totient is φ = 2049791668.

The previous prime is 2049791657. The next prime is 2049791699. The reversal of 2049791669 is 9661979402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719097444 + 330694225 = 41462^2 + 18185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049791669 - 2²⁰ = 2048743093 is a prime.

It is a super-2 number, since 2×2049791669² = 8403291772603611122, 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 2049791669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2049791699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024895834 + 1024895835.

It is an arithmetic number, because the mean of its divisors is an integer number (1024895835).

Almost surely, 2^2049791669 is an apocalyptic number.

It is an amenable number.

2049791669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049791669 is an equidigital number, since it uses as much as digits as its factorization.

2049791669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 2049791669 is about 45274.6250012079. The cubic root of 2049791669 is about 1270.2910587989.

The spelling of 2049791669 in words is "two billion, forty-nine million, seven hundred ninety-one thousand, six hundred sixty-nine".