281089117 has 2 divisors, whose sum is σ = 281089118. Its totient is φ = 281089116.

The previous prime is 281089079. The next prime is 281089147. The reversal of 281089117 is 711980182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238826116 + 42263001 = 15454^2 + 6501^2 .

It is a cyclic number.

It is not a de Polignac number, because 281089117 - 2¹⁹ = 280564829 is a prime.

It is a super-2 number, since 2×281089117² = 158022183391679378, 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 (281089147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140544558 + 140544559.

It is an arithmetic number, because the mean of its divisors is an integer number (140544559).

Almost surely, 2^281089117 is an apocalyptic number.

It is an amenable number.

281089117 is a deficient number, since it is larger than the sum of its proper divisors (1).

281089117 is an equidigital number, since it uses as much as digits as its factorization.

281089117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 281089117 is about 16765.7125407780. The cubic root of 281089117 is about 655.0603965052.

The spelling of 281089117 in words is "two hundred eighty-one million, eighty-nine thousand, one hundred seventeen".