272221993 has 2 divisors, whose sum is σ = 272221994. Its totient is φ = 272221992.

The previous prime is 272221991. The next prime is 272222021. The reversal of 272221993 is 399122272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211179024 + 61042969 = 14532^2 + 7813^2 .

It is a cyclic number.

It is not a de Polignac number, because 272221993 - 2¹ = 272221991 is a prime.

Together with 272221991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (272221991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136110996 + 136110997.

It is an arithmetic number, because the mean of its divisors is an integer number (136110997).

Almost surely, 2^272221993 is an apocalyptic number.

It is an amenable number.

272221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

272221993 is an equidigital number, since it uses as much as digits as its factorization.

272221993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 272221993 is about 16499.1512812023. The cubic root of 272221993 is about 648.0985797605.

The spelling of 272221993 in words is "two hundred seventy-two million, two hundred twenty-one thousand, nine hundred ninety-three".