272981 has 2 divisors, whose sum is σ = 272982. Its totient is φ = 272980.

The previous prime is 272971. The next prime is 272983. The reversal of 272981 is 189272.

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., 255025 + 17956 = 505^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 272981 - 2⁶ = 272917 is a prime.

It is a super-2 number, since 2×272981² = 149037252722, which contains 22 as substring.

Together with 272983, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136490 + 136491.

It is an arithmetic number, because the mean of its divisors is an integer number (136491).

2²⁷²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

272981 is a deficient number, since it is larger than the sum of its proper divisors (1).

272981 is an equidigital number, since it uses as much as digits as its factorization.

272981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 272981 is about 522.4758367619. The cubic root of 272981 is about 64.8700361759.

The spelling of 272981 in words is "two hundred seventy-two thousand, nine hundred eighty-one".