2947647649 has 2 divisors, whose sum is σ = 2947647650. Its totient is φ = 2947647648.

The previous prime is 2947647589. The next prime is 2947647653. The reversal of 2947647649 is 9467467492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2898745600 + 48902049 = 53840^2 + 6993^2 .

It is a cyclic number.

It is not a de Polignac number, because 2947647649 - 2¹⁷ = 2947516577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2947647593 and 2947647602.

It is not a weakly prime, because it can be changed into another prime (2947641649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1473823824 + 1473823825.

It is an arithmetic number, because the mean of its divisors is an integer number (1473823825).

Almost surely, 2^2947647649 is an apocalyptic number.

It is an amenable number.

2947647649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2947647649 is an equidigital number, since it uses as much as digits as its factorization.

2947647649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 58.

The square root of 2947647649 is about 54292.2429910572. The cubic root of 2947647649 is about 1433.8108289707.

The spelling of 2947647649 in words is "two billion, nine hundred forty-seven million, six hundred forty-seven thousand, six hundred forty-nine".