2708657647 has 2 divisors, whose sum is σ = 2708657648. Its totient is φ = 2708657646.

The previous prime is 2708657621. The next prime is 2708657683. The reversal of 2708657647 is 7467568072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2708657647 - 2³¹ = 561173999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2708657594 and 2708657603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2708657747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1354328823 + 1354328824.

It is an arithmetic number, because the mean of its divisors is an integer number (1354328824).

Almost surely, 2^2708657647 is an apocalyptic number.

2708657647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2708657647 is an equidigital number, since it uses as much as digits as its factorization.

2708657647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The square root of 2708657647 is about 52044.7657983010. The cubic root of 2708657647 is about 1393.9634042390.

The spelling of 2708657647 in words is "two billion, seven hundred eight million, six hundred fifty-seven thousand, six hundred forty-seven".