271969 has 2 divisors, whose sum is σ = 271970. Its totient is φ = 271968.

The previous prime is 271967. The next prime is 271981. The reversal of 271969 is 969172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214369 + 57600 = 463^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 271969 - 2¹ = 271967 is a prime.

It is a super-2 number, since 2×271969² = 147934273922, which contains 22 as substring.

Together with 271967, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (271967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135984 + 135985.

It is an arithmetic number, because the mean of its divisors is an integer number (135985).

2²⁷¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

271969 is a deficient number, since it is larger than the sum of its proper divisors (1).

271969 is an equidigital number, since it uses as much as digits as its factorization.

271969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 271969 is about 521.5064716760. The cubic root of 271969 is about 64.7897744623.

The spelling of 271969 in words is "two hundred seventy-one thousand, nine hundred sixty-nine".