2721929909 has 2 divisors, whose sum is σ = 2721929910. Its totient is φ = 2721929908.

The previous prime is 2721929887. The next prime is 2721929923. The reversal of 2721929909 is 9099291272.

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., 1788444100 + 933485809 = 42290^2 + 30553^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721929909 - 2²⁰ = 2720881333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721922909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360964954 + 1360964955.

It is an arithmetic number, because the mean of its divisors is an integer number (1360964955).

Almost surely, 2^2721929909 is an apocalyptic number.

It is an amenable number.

2721929909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721929909 is an equidigital number, since it uses as much as digits as its factorization.

2721929909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 2721929909 is about 52172.1181187806. The cubic root of 2721929909 is about 1396.2364750002.

The spelling of 2721929909 in words is "two billion, seven hundred twenty-one million, nine hundred twenty-nine thousand, nine hundred nine".