261322933 has 2 divisors, whose sum is σ = 261322934. Its totient is φ = 261322932.

The previous prime is 261322907. The next prime is 261322937. The reversal of 261322933 is 339223162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237683889 + 23639044 = 15417^2 + 4862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261322933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261322895 and 261322904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261322937) 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, 130661466 + 130661467.

It is an arithmetic number, because the mean of its divisors is an integer number (130661467).

Almost surely, 2^261322933 is an apocalyptic number.

It is an amenable number.

261322933 is a deficient number, since it is larger than the sum of its proper divisors (1).

261322933 is an equidigital number, since it uses as much as digits as its factorization.

261322933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 31.

The square root of 261322933 is about 16165.4858572206. The cubic root of 261322933 is about 639.3311151350.

The spelling of 261322933 in words is "two hundred sixty-one million, three hundred twenty-two thousand, nine hundred thirty-three".