2729949809 has 2 divisors, whose sum is σ = 2729949810. Its totient is φ = 2729949808.

The previous prime is 2729949791. The next prime is 2729949823. The reversal of 2729949809 is 9089499272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2720665600 + 9284209 = 52160^2 + 3047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2729949809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2729949889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364974904 + 1364974905.

It is an arithmetic number, because the mean of its divisors is an integer number (1364974905).

Almost surely, 2^2729949809 is an apocalyptic number.

It is an amenable number.

2729949809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2729949809 is an equidigital number, since it uses as much as digits as its factorization.

2729949809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 2729949809 is about 52248.9216060963. The cubic root of 2729949809 is about 1397.6064217692.

The spelling of 2729949809 in words is "two billion, seven hundred twenty-nine million, nine hundred forty-nine thousand, eight hundred nine".