269981 has 2 divisors, whose sum is σ = 269982. Its totient is φ = 269980.

The previous prime is 269953. The next prime is 269987. The reversal of 269981 is 189962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241081 + 28900 = 491^2 + 170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-269981 is a prime.

It is a super-2 number, since 2×269981² = 145779480722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134990 + 134991.

It is an arithmetic number, because the mean of its divisors is an integer number (134991).

2²⁶⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

269981 is a deficient number, since it is larger than the sum of its proper divisors (1).

269981 is an equidigital number, since it uses as much as digits as its factorization.

269981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 269981 is about 519.5969591905. The cubic root of 269981 is about 64.6315245817.

The spelling of 269981 in words is "two hundred sixty-nine thousand, nine hundred eighty-one".