260403809 has 2 divisors, whose sum is σ = 260403810. Its totient is φ = 260403808.

The previous prime is 260403791. The next prime is 260403821. The reversal of 260403809 is 908304062.

260403809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240405025 + 19998784 = 15505^2 + 4472^2 .

It is a cyclic number.

It is not a de Polignac number, because 260403809 - 2²⁰ = 259355233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260403839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130201904 + 130201905.

It is an arithmetic number, because the mean of its divisors is an integer number (130201905).

Almost surely, 2^260403809 is an apocalyptic number.

It is an amenable number.

260403809 is a deficient number, since it is larger than the sum of its proper divisors (1).

260403809 is an equidigital number, since it uses as much as digits as its factorization.

260403809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 260403809 is about 16137.0322240491. The cubic root of 260403809 is about 638.5806836737.

The spelling of 260403809 in words is "two hundred sixty million, four hundred three thousand, eight hundred nine".