261121703 has 2 divisors, whose sum is σ = 261121704. Its totient is φ = 261121702.

The previous prime is 261121699. The next prime is 261121709. The reversal of 261121703 is 307121162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261121703 - 2² = 261121699 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261121709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130560851 + 130560852.

It is an arithmetic number, because the mean of its divisors is an integer number (130560852).

Almost surely, 2^261121703 is an apocalyptic number.

261121703 is a deficient number, since it is larger than the sum of its proper divisors (1).

261121703 is an equidigital number, since it uses as much as digits as its factorization.

261121703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 261121703 is about 16159.2605957080. The cubic root of 261121703 is about 639.1669687592.

Adding to 261121703 its reverse (307121162), we get a palindrome (568242865).

The spelling of 261121703 in words is "two hundred sixty-one million, one hundred twenty-one thousand, seven hundred three".