260621447 has 2 divisors, whose sum is σ = 260621448. Its totient is φ = 260621446.

The previous prime is 260621437. The next prime is 260621453. The reversal of 260621447 is 744126062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260621447 - 2¹² = 260617351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260621437) 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, 130310723 + 130310724.

It is an arithmetic number, because the mean of its divisors is an integer number (130310724).

Almost surely, 2^260621447 is an apocalyptic number.

260621447 is a deficient number, since it is larger than the sum of its proper divisors (1).

260621447 is an equidigital number, since it uses as much as digits as its factorization.

260621447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 260621447 is about 16143.7742489171. The cubic root of 260621447 is about 638.7585365796.

The spelling of 260621447 in words is "two hundred sixty million, six hundred twenty-one thousand, four hundred forty-seven".