1097543149 has 2 divisors, whose sum is σ = 1097543150. Its totient is φ = 1097543148.

The previous prime is 1097543143. The next prime is 1097543159. The reversal of 1097543149 is 9413457901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564395049 + 533148100 = 23757^2 + 23090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097543149 - 2¹⁷ = 1097412077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097543143) 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, 548771574 + 548771575.

It is an arithmetic number, because the mean of its divisors is an integer number (548771575).

Almost surely, 2^1097543149 is an apocalyptic number.

It is an amenable number.

1097543149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097543149 is an equidigital number, since it uses as much as digits as its factorization.

1097543149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1097543149 is about 33129.1887766664. The cubic root of 1097543149 is about 1031.5110097136.

The spelling of 1097543149 in words is "one billion, ninety-seven million, five hundred forty-three thousand, one hundred forty-nine".