261975283 has 2 divisors, whose sum is σ = 261975284. Its totient is φ = 261975282.

The previous prime is 261975251. The next prime is 261975289. The reversal of 261975283 is 382579162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261975283 - 2⁵ = 261975251 is a prime.

It is not a weakly prime, because it can be changed into another prime (261975289) 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, 130987641 + 130987642.

It is an arithmetic number, because the mean of its divisors is an integer number (130987642).

Almost surely, 2^261975283 is an apocalyptic number.

261975283 is a deficient number, since it is larger than the sum of its proper divisors (1).

261975283 is an equidigital number, since it uses as much as digits as its factorization.

261975283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 261975283 is about 16185.6505275506. The cubic root of 261975283 is about 639.8626682873.

The spelling of 261975283 in words is "two hundred sixty-one million, nine hundred seventy-five thousand, two hundred eighty-three".