272128949 has 2 divisors, whose sum is σ = 272128950. Its totient is φ = 272128948.

The previous prime is 272128933. The next prime is 272128999. The reversal of 272128949 is 949821272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271920100 + 208849 = 16490^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 272128949 - 2⁴ = 272128933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272128999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136064474 + 136064475.

It is an arithmetic number, because the mean of its divisors is an integer number (136064475).

Almost surely, 2^272128949 is an apocalyptic number.

It is an amenable number.

272128949 is a deficient number, since it is larger than the sum of its proper divisors (1).

272128949 is an equidigital number, since it uses as much as digits as its factorization.

272128949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 272128949 is about 16496.3313800372. The cubic root of 272128949 is about 648.0247324871.

The spelling of 272128949 in words is "two hundred seventy-two million, one hundred twenty-eight thousand, nine hundred forty-nine".