427278358517 has 2 divisors, whose sum is σ = 427278358518. Its totient is φ = 427278358516.

The previous prime is 427278358447. The next prime is 427278358571. The reversal of 427278358517 is 715853872724.

Together with next prime (427278358571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285269219236 + 142009139281 = 534106^2 + 376841^2 .

It is a cyclic number.

It is not a de Polignac number, because 427278358517 - 2³⁸ = 152400451573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427278318517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213639179258 + 213639179259.

It is an arithmetic number, because the mean of its divisors is an integer number (213639179259).

Almost surely, 2^427278358517 is an apocalyptic number.

It is an amenable number.

427278358517 is a deficient number, since it is larger than the sum of its proper divisors (1).

427278358517 is an equidigital number, since it uses as much as digits as its factorization.

427278358517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26342400, while the sum is 59.

The spelling of 427278358517 in words is "four hundred twenty-seven billion, two hundred seventy-eight million, three hundred fifty-eight thousand, five hundred seventeen".