1102543549 has 2 divisors, whose sum is σ = 1102543550. Its totient is φ = 1102543548.

The previous prime is 1102543543. The next prime is 1102543579. The reversal of 1102543549 is 9453452011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1090188324 + 12355225 = 33018^2 + 3515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1102543549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1102543543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551271774 + 551271775.

It is an arithmetic number, because the mean of its divisors is an integer number (551271775).

Almost surely, 2^1102543549 is an apocalyptic number.

It is an amenable number.

1102543549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102543549 is an equidigital number, since it uses as much as digits as its factorization.

1102543549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1102543549 is about 33204.5712063866. The cubic root of 1102543549 is about 1033.0751560226.

The spelling of 1102543549 in words is "one billion, one hundred two million, five hundred forty-three thousand, five hundred forty-nine".