261546827 has 2 divisors, whose sum is σ = 261546828. Its totient is φ = 261546826.

The previous prime is 261546797. The next prime is 261546829. The reversal of 261546827 is 728645162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261546827 - 2¹⁰ = 261545803 is a prime.

Together with 261546829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261546829) 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, 130773413 + 130773414.

It is an arithmetic number, because the mean of its divisors is an integer number (130773414).

Almost surely, 2^261546827 is an apocalyptic number.

261546827 is a deficient number, since it is larger than the sum of its proper divisors (1).

261546827 is an equidigital number, since it uses as much as digits as its factorization.

261546827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The square root of 261546827 is about 16172.4094370629. The cubic root of 261546827 is about 639.5136498739.

The spelling of 261546827 in words is "two hundred sixty-one million, five hundred forty-six thousand, eight hundred twenty-seven".