2729201081 has 2 divisors, whose sum is σ = 2729201082. Its totient is φ = 2729201080.

The previous prime is 2729201053. The next prime is 2729201113. The reversal of 2729201081 is 1801029272.

2729201081 = 36940² + 36941².

It is a happy number.

2729201081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2729201113) can be obtained adding 2729201081 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364637481 + 1364563600 = 36941^2 + 36940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2729201081 - 2¹⁴ = 2729184697 is a prime.

It is a super-2 number, since 2×2729201081² = 14897077081063137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2729201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364600540 + 1364600541.

It is an arithmetic number, because the mean of its divisors is an integer number (1364600541).

Almost surely, 2^2729201081 is an apocalyptic number.

2729201081 is the 36941-st centered square number.

It is an amenable number.

2729201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2729201081 is an equidigital number, since it uses as much as digits as its factorization.

2729201081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 2729201081 is about 52241.7561056288. The cubic root of 2729201081 is about 1397.4786388654.

The spelling of 2729201081 in words is "two billion, seven hundred twenty-nine million, two hundred one thousand, eighty-one".