260891597 has 2 divisors, whose sum is σ = 260891598. Its totient is φ = 260891596.

The previous prime is 260891591. The next prime is 260891611. The reversal of 260891597 is 795198062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152127556 + 108764041 = 12334^2 + 10429^2 .

It is a cyclic number.

It is not a de Polignac number, because 260891597 - 2⁴ = 260891581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260891591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130445798 + 130445799.

It is an arithmetic number, because the mean of its divisors is an integer number (130445799).

Almost surely, 2^260891597 is an apocalyptic number.

It is an amenable number.

260891597 is a deficient number, since it is larger than the sum of its proper divisors (1).

260891597 is an equidigital number, since it uses as much as digits as its factorization.

260891597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 260891597 is about 16152.1390843442. The cubic root of 260891597 is about 638.9791644056.

The spelling of 260891597 in words is "two hundred sixty million, eight hundred ninety-one thousand, five hundred ninety-seven".