2749291309 has 2 divisors, whose sum is σ = 2749291310. Its totient is φ = 2749291308.

The previous prime is 2749291297. The next prime is 2749291417. The reversal of 2749291309 is 9031929472.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2632716100 + 116575209 = 51310^2 + 10797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2749291309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2749291009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1374645654 + 1374645655.

It is an arithmetic number, because the mean of its divisors is an integer number (1374645655).

Almost surely, 2^2749291309 is an apocalyptic number.

It is an amenable number.

2749291309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749291309 is an equidigital number, since it uses as much as digits as its factorization.

2749291309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 2749291309 is about 52433.6848695569. The cubic root of 2749291309 is about 1400.8993046815.

The spelling of 2749291309 in words is "two billion, seven hundred forty-nine million, two hundred ninety-one thousand, three hundred nine".