272663861 has 2 divisors, whose sum is σ = 272663862. Its totient is φ = 272663860.

The previous prime is 272663857. The next prime is 272663863. The reversal of 272663861 is 168366272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268763236 + 3900625 = 16394^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 272663861 - 2² = 272663857 is a prime.

Together with 272663863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272663863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136331930 + 136331931.

It is an arithmetic number, because the mean of its divisors is an integer number (136331931).

Almost surely, 2^272663861 is an apocalyptic number.

It is an amenable number.

272663861 is a deficient number, since it is larger than the sum of its proper divisors (1).

272663861 is an equidigital number, since it uses as much as digits as its factorization.

272663861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 272663861 is about 16512.5364798991. The cubic root of 272663861 is about 648.4490525655.

The spelling of 272663861 in words is "two hundred seventy-two million, six hundred sixty-three thousand, eight hundred sixty-one".