261363727 has 2 divisors, whose sum is σ = 261363728. Its totient is φ = 261363726.

The previous prime is 261363721. The next prime is 261363769. The reversal of 261363727 is 727363162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261363727 - 2¹¹ = 261361679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261363721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130681863 + 130681864.

It is an arithmetic number, because the mean of its divisors is an integer number (130681864).

Almost surely, 2^261363727 is an apocalyptic number.

261363727 is a deficient number, since it is larger than the sum of its proper divisors (1).

261363727 is an equidigital number, since it uses as much as digits as its factorization.

261363727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 37.

The square root of 261363727 is about 16166.7475702443. The cubic root of 261363727 is about 639.3643811483.

The spelling of 261363727 in words is "two hundred sixty-one million, three hundred sixty-three thousand, seven hundred twenty-seven".