261038147 has 2 divisors, whose sum is σ = 261038148. Its totient is φ = 261038146.

The previous prime is 261038117. The next prime is 261038171. The reversal of 261038147 is 741830162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261038147 - 2⁶ = 261038083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261038117) 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, 130519073 + 130519074.

It is an arithmetic number, because the mean of its divisors is an integer number (130519074).

Almost surely, 2^261038147 is an apocalyptic number.

261038147 is a deficient number, since it is larger than the sum of its proper divisors (1).

261038147 is an equidigital number, since it uses as much as digits as its factorization.

261038147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 261038147 is about 16156.6749982786. The cubic root of 261038147 is about 639.0987860789.

The spelling of 261038147 in words is "two hundred sixty-one million, thirty-eight thousand, one hundred forty-seven".