260205409 has 2 divisors, whose sum is σ = 260205410. Its totient is φ = 260205408.

The previous prime is 260205403. The next prime is 260205433. The reversal of 260205409 is 904502062.

260205409 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., 260112384 + 93025 = 16128^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 260205409 - 2³ = 260205401 is a prime.

It is not a weakly prime, because it can be changed into another prime (260205401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130102704 + 130102705.

It is an arithmetic number, because the mean of its divisors is an integer number (130102705).

Almost surely, 2^260205409 is an apocalyptic number.

It is an amenable number.

260205409 is a deficient number, since it is larger than the sum of its proper divisors (1).

260205409 is an equidigital number, since it uses as much as digits as its factorization.

260205409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 260205409 is about 16130.8837017691. The cubic root of 260205409 is about 638.4184656200.

The spelling of 260205409 in words is "two hundred sixty million, two hundred five thousand, four hundred nine".