2729920649 has 2 divisors, whose sum is σ = 2729920650. Its totient is φ = 2729920648.

The previous prime is 2729920637. The next prime is 2729920657. The reversal of 2729920649 is 9460299272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2712847225 + 17073424 = 52085^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2729920649 - 2¹⁶ = 2729855113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2729920597 and 2729920606.

It is not a weakly prime, because it can be changed into another prime (2729922649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364960324 + 1364960325.

It is an arithmetic number, because the mean of its divisors is an integer number (1364960325).

Almost surely, 2^2729920649 is an apocalyptic number.

It is an amenable number.

2729920649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2729920649 is an equidigital number, since it uses as much as digits as its factorization.

2729920649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 2729920649 is about 52248.6425565296. The cubic root of 2729920649 is about 1397.6014455668.

The spelling of 2729920649 in words is "two billion, seven hundred twenty-nine million, nine hundred twenty thousand, six hundred forty-nine".