260248991 has 2 divisors, whose sum is σ = 260248992. Its totient is φ = 260248990.

The previous prime is 260248981. The next prime is 260249047. The reversal of 260248991 is 199842062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260248991 - 2¹⁸ = 259986847 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260248981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130124495 + 130124496.

It is an arithmetic number, because the mean of its divisors is an integer number (130124496).

Almost surely, 2^260248991 is an apocalyptic number.

260248991 is a deficient number, since it is larger than the sum of its proper divisors (1).

260248991 is an equidigital number, since it uses as much as digits as its factorization.

260248991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 260248991 is about 16132.2345321409. The cubic root of 260248991 is about 638.4541066935.

The spelling of 260248991 in words is "two hundred sixty million, two hundred forty-eight thousand, nine hundred ninety-one".