261360623 has 2 divisors, whose sum is σ = 261360624. Its totient is φ = 261360622.

The previous prime is 261360613. The next prime is 261360641. The reversal of 261360623 is 326063162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261360623 - 2⁴ = 261360607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261360613) 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, 130680311 + 130680312.

It is an arithmetic number, because the mean of its divisors is an integer number (130680312).

Almost surely, 2^261360623 is an apocalyptic number.

261360623 is a deficient number, since it is larger than the sum of its proper divisors (1).

261360623 is an equidigital number, since it uses as much as digits as its factorization.

261360623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 261360623 is about 16166.6515704397. The cubic root of 261360623 is about 639.3618500716.

It can be divided in two parts, 2613 and 60623, that added together give a palindrome (63236).

The spelling of 261360623 in words is "two hundred sixty-one million, three hundred sixty thousand, six hundred twenty-three".