261038873 has 2 divisors, whose sum is σ = 261038874. Its totient is φ = 261038872.

The previous prime is 261038867. The next prime is 261038881. The reversal of 261038873 is 378830162.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260241424 + 797449 = 16132^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 261038873 - 2¹² = 261034777 is a prime.

It is a super-2 number, since 2×261038873² = 136282586434220258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (261008873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130519436 + 130519437.

It is an arithmetic number, because the mean of its divisors is an integer number (130519437).

Almost surely, 2^261038873 is an apocalyptic number.

It is an amenable number.

261038873 is a deficient number, since it is larger than the sum of its proper divisors (1).

261038873 is an equidigital number, since it uses as much as digits as its factorization.

261038873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 261038873 is about 16156.6974657570. The cubic root of 261038873 is about 639.0993785662.

The spelling of 261038873 in words is "two hundred sixty-one million, thirty-eight thousand, eight hundred seventy-three".