2047847657 has 2 divisors, whose sum is σ = 2047847658. Its totient is φ = 2047847656.

The previous prime is 2047847651. The next prime is 2047847671. The reversal of 2047847657 is 7567487402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1617326656 + 430521001 = 40216^2 + 20749^2 .

It is a cyclic number.

It is not a de Polignac number, because 2047847657 - 2¹² = 2047843561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2047847651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023923828 + 1023923829.

It is an arithmetic number, because the mean of its divisors is an integer number (1023923829).

Almost surely, 2^2047847657 is an apocalyptic number.

It is an amenable number.

2047847657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2047847657 is an equidigital number, since it uses as much as digits as its factorization.

2047847657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2634240, while the sum is 50.

The square root of 2047847657 is about 45253.1507963810. The cubic root of 2047847657 is about 1269.8893525856.

The spelling of 2047847657 in words is "two billion, forty-seven million, eight hundred forty-seven thousand, six hundred fifty-seven".