272648821 has 2 divisors, whose sum is σ = 272648822. Its totient is φ = 272648820.

The previous prime is 272648777. The next prime is 272648837. The reversal of 272648821 is 128846272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256448196 + 16200625 = 16014^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 272648821 - 2¹⁵ = 272616053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272648021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136324410 + 136324411.

It is an arithmetic number, because the mean of its divisors is an integer number (136324411).

Almost surely, 2^272648821 is an apocalyptic number.

It is an amenable number.

272648821 is a deficient number, since it is larger than the sum of its proper divisors (1).

272648821 is an equidigital number, since it uses as much as digits as its factorization.

272648821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 272648821 is about 16512.0810620588. The cubic root of 272648821 is about 648.4371296395.

The spelling of 272648821 in words is "two hundred seventy-two million, six hundred forty-eight thousand, eight hundred twenty-one".