260817439 has 2 divisors, whose sum is σ = 260817440. Its totient is φ = 260817438.

The previous prime is 260817391. The next prime is 260817461. The reversal of 260817439 is 934718062.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260817439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260817839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130408719 + 130408720.

It is an arithmetic number, because the mean of its divisors is an integer number (130408720).

Almost surely, 2^260817439 is an apocalyptic number.

260817439 is a deficient number, since it is larger than the sum of its proper divisors (1).

260817439 is an equidigital number, since it uses as much as digits as its factorization.

260817439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 260817439 is about 16149.8433119334. The cubic root of 260817439 is about 638.9186157488.

The spelling of 260817439 in words is "two hundred sixty million, eight hundred seventeen thousand, four hundred thirty-nine".