261712067 has 2 divisors, whose sum is σ = 261712068. Its totient is φ = 261712066.

The previous prime is 261712057. The next prime is 261712103. The reversal of 261712067 is 760217162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261712067 - 2²² = 257517763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261712057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130856033 + 130856034.

It is an arithmetic number, because the mean of its divisors is an integer number (130856034).

Almost surely, 2^261712067 is an apocalyptic number.

261712067 is a deficient number, since it is larger than the sum of its proper divisors (1).

261712067 is an equidigital number, since it uses as much as digits as its factorization.

261712067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 261712067 is about 16177.5173311606. The cubic root of 261712067 is about 639.6482987887.

The spelling of 261712067 in words is "two hundred sixty-one million, seven hundred twelve thousand, sixty-seven".