2049689749 has 2 divisors, whose sum is σ = 2049689750. Its totient is φ = 2049689748.

The previous prime is 2049689701. The next prime is 2049689791. The reversal of 2049689749 is 9479869402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1499083524 + 550606225 = 38718^2 + 23465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049689749 - 2¹⁷ = 2049558677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2049689693 and 2049689702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2049689549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024844874 + 1024844875.

It is an arithmetic number, because the mean of its divisors is an integer number (1024844875).

Almost surely, 2^2049689749 is an apocalyptic number.

It is an amenable number.

2049689749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049689749 is an equidigital number, since it uses as much as digits as its factorization.

2049689749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The square root of 2049689749 is about 45273.4994119076. The cubic root of 2049689749 is about 1270.2700045925.

The spelling of 2049689749 in words is "two billion, forty-nine million, six hundred eighty-nine thousand, seven hundred forty-nine".