2549942309 has 2 divisors, whose sum is σ = 2549942310. Its totient is φ = 2549942308.

The previous prime is 2549942281. The next prime is 2549942377. The reversal of 2549942309 is 9032499452.

2549942309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2237006209 + 312936100 = 47297^2 + 17690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2549942309 - 2⁸ = 2549942053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2549942389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274971154 + 1274971155.

It is an arithmetic number, because the mean of its divisors is an integer number (1274971155).

Almost surely, 2^2549942309 is an apocalyptic number.

It is an amenable number.

2549942309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549942309 is an equidigital number, since it uses as much as digits as its factorization.

2549942309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 2549942309 is about 50496.9534625605. The cubic root of 2549942309 is about 1366.1869050567.

The spelling of 2549942309 in words is "two billion, five hundred forty-nine million, nine hundred forty-two thousand, three hundred nine".