261160637 has 2 divisors, whose sum is σ = 261160638. Its totient is φ = 261160636.

The previous prime is 261160597. The next prime is 261160657. The reversal of 261160637 is 736061162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228281881 + 32878756 = 15109^2 + 5734^2 .

It is a cyclic number.

It is not a de Polignac number, because 261160637 - 2⁸ = 261160381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261160657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130580318 + 130580319.

It is an arithmetic number, because the mean of its divisors is an integer number (130580319).

Almost surely, 2^261160637 is an apocalyptic number.

It is an amenable number.

261160637 is a deficient number, since it is larger than the sum of its proper divisors (1).

261160637 is an equidigital number, since it uses as much as digits as its factorization.

261160637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 261160637 is about 16160.4652470156. The cubic root of 261160637 is about 639.1987343941.

The spelling of 261160637 in words is "two hundred sixty-one million, one hundred sixty thousand, six hundred thirty-seven".