1089852781 has 2 divisors, whose sum is σ = 1089852782. Its totient is φ = 1089852780.

The previous prime is 1089852733. The next prime is 1089852809. The reversal of 1089852781 is 1872589801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951414025 + 138438756 = 30845^2 + 11766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089852781 - 2⁷ = 1089852653 is a prime.

It is a super-2 number, since 2×1089852781² = 2375558168506867922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089852481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544926390 + 544926391.

It is an arithmetic number, because the mean of its divisors is an integer number (544926391).

Almost surely, 2^1089852781 is an apocalyptic number.

It is an amenable number.

1089852781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089852781 is an equidigital number, since it uses as much as digits as its factorization.

1089852781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 49.

The square root of 1089852781 is about 33012.9183956826. The cubic root of 1089852781 is about 1029.0961313585.

The spelling of 1089852781 in words is "one billion, eighty-nine million, eight hundred fifty-two thousand, seven hundred eighty-one".