261270089 has 2 divisors, whose sum is σ = 261270090. Its totient is φ = 261270088.

The previous prime is 261270049. The next prime is 261270169. The reversal of 261270089 is 980072162.

It is a happy number.

261270089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229007689 + 32262400 = 15133^2 + 5680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261270089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261270029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130635044 + 130635045.

It is an arithmetic number, because the mean of its divisors is an integer number (130635045).

Almost surely, 2^261270089 is an apocalyptic number.

It is an amenable number.

261270089 is a deficient number, since it is larger than the sum of its proper divisors (1).

261270089 is an equidigital number, since it uses as much as digits as its factorization.

261270089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 261270089 is about 16163.8513046860. The cubic root of 261270089 is about 639.2880176405.

The spelling of 261270089 in words is "two hundred sixty-one million, two hundred seventy thousand, eighty-nine".