261433267 has 2 divisors, whose sum is σ = 261433268. Its totient is φ = 261433266.

The previous prime is 261433247. The next prime is 261433279. The reversal of 261433267 is 762334162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261433267 is a prime.

It is not a weakly prime, because it can be changed into another prime (261433247) 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, 130716633 + 130716634.

It is an arithmetic number, because the mean of its divisors is an integer number (130716634).

Almost surely, 2^261433267 is an apocalyptic number.

261433267 is a deficient number, since it is larger than the sum of its proper divisors (1).

261433267 is an equidigital number, since it uses as much as digits as its factorization.

261433267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 34.

The square root of 261433267 is about 16168.8981380922. The cubic root of 261433267 is about 639.4210804934.

The spelling of 261433267 in words is "two hundred sixty-one million, four hundred thirty-three thousand, two hundred sixty-seven".