260981393 has 2 divisors, whose sum is σ = 260981394. Its totient is φ = 260981392.

The previous prime is 260981389. The next prime is 260981417. The reversal of 260981393 is 393189062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161620369 + 99361024 = 12713^2 + 9968^2 .

It is a cyclic number.

It is not a de Polignac number, because 260981393 - 2² = 260981389 is a prime.

It is a super-2 number, since 2×260981393² = 136222574984440898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260981393.

It is not a weakly prime, because it can be changed into another prime (260981333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130490696 + 130490697.

It is an arithmetic number, because the mean of its divisors is an integer number (130490697).

Almost surely, 2^260981393 is an apocalyptic number.

It is an amenable number.

260981393 is a deficient number, since it is larger than the sum of its proper divisors (1).

260981393 is an equidigital number, since it uses as much as digits as its factorization.

260981393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 260981393 is about 16154.9185389466. The cubic root of 260981393 is about 639.0524658484.

The spelling of 260981393 in words is "two hundred sixty million, nine hundred eighty-one thousand, three hundred ninety-three".