261546097 has 2 divisors, whose sum is σ = 261546098. Its totient is φ = 261546096.

The previous prime is 261546083. The next prime is 261546119. The reversal of 261546097 is 790645162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231526656 + 30019441 = 15216^2 + 5479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261546097 is a prime.

It is not a weakly prime, because it can be changed into another prime (261546017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130773048 + 130773049.

It is an arithmetic number, because the mean of its divisors is an integer number (130773049).

Almost surely, 2^261546097 is an apocalyptic number.

It is an amenable number.

261546097 is a deficient number, since it is larger than the sum of its proper divisors (1).

261546097 is an equidigital number, since it uses as much as digits as its factorization.

261546097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 261546097 is about 16172.3868677447. The cubic root of 261546097 is about 639.5130548939.

The spelling of 261546097 in words is "two hundred sixty-one million, five hundred forty-six thousand, ninety-seven".