261600263 has 2 divisors, whose sum is σ = 261600264. Its totient is φ = 261600262.

The previous prime is 261600259. The next prime is 261600293. The reversal of 261600263 is 362006162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261600263 - 2² = 261600259 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261600203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130800131 + 130800132.

It is an arithmetic number, because the mean of its divisors is an integer number (130800132).

Almost surely, 2^261600263 is an apocalyptic number.

261600263 is a deficient number, since it is larger than the sum of its proper divisors (1).

261600263 is an equidigital number, since it uses as much as digits as its factorization.

261600263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 261600263 is about 16174.0614256284. The cubic root of 261600263 is about 639.5571994042.

The spelling of 261600263 in words is "two hundred sixty-one million, six hundred thousand, two hundred sixty-three".