260648621 has 2 divisors, whose sum is σ = 260648622. Its totient is φ = 260648620.

The previous prime is 260648561. The next prime is 260648653. The reversal of 260648621 is 126846062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232410025 + 28238596 = 15245^2 + 5314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260648621 is a 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 (260648221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130324310 + 130324311.

It is an arithmetic number, because the mean of its divisors is an integer number (130324311).

Almost surely, 2^260648621 is an apocalyptic number.

It is an amenable number.

260648621 is a deficient number, since it is larger than the sum of its proper divisors (1).

260648621 is an equidigital number, since it uses as much as digits as its factorization.

260648621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 260648621 is about 16144.6158517321. The cubic root of 260648621 is about 638.7807361101.

The spelling of 260648621 in words is "two hundred sixty million, six hundred forty-eight thousand, six hundred twenty-one".