261068893 has 2 divisors, whose sum is σ = 261068894. Its totient is φ = 261068892.

The previous prime is 261068869. The next prime is 261068897. The reversal of 261068893 is 398860162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222666084 + 38402809 = 14922^2 + 6197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261068893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261068897) 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, 130534446 + 130534447.

It is an arithmetic number, because the mean of its divisors is an integer number (130534447).

Almost surely, 2^261068893 is an apocalyptic number.

It is an amenable number.

261068893 is a deficient number, since it is larger than the sum of its proper divisors (1).

261068893 is an equidigital number, since it uses as much as digits as its factorization.

261068893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 261068893 is about 16157.6264655425. The cubic root of 261068893 is about 639.1238768688.

The spelling of 261068893 in words is "two hundred sixty-one million, sixty-eight thousand, eight hundred ninety-three".