2728129 has 2 divisors, whose sum is σ = 2728130. Its totient is φ = 2728128.

The previous prime is 2728097. The next prime is 2728163. The reversal of 2728129 is 9218272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 725904 = 1415^2 + 852^2 .

It is a cyclic number.

It is not a de Polignac number, because 2728129 - 2⁵ = 2728097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2728129.

It is not a weakly prime, because it can be changed into another prime (2728169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364064 + 1364065.

It is an arithmetic number, because the mean of its divisors is an integer number (1364065).

2^2728129 is an apocalyptic number.

It is an amenable number.

2728129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728129 is an equidigital number, since it uses as much as digits as its factorization.

2728129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 2728129 is about 1651.7048767864. The cubic root of 2728129 is about 139.7295629690.

The spelling of 2728129 in words is "two million, seven hundred twenty-eight thousand, one hundred twenty-nine".