2977008649 has 4 divisors (see below), whose sum is σ = 2977743636. Its totient is φ = 2976273664.

The previous prime is 2977008589. The next prime is 2977008679. The reversal of 2977008649 is 9468007792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180714249 + 2796294400 = 13443^2 + 52880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2977008649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2977008596 and 2977008605.

It is not an unprimeable number, because it can be changed into a prime (2977008679) 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 in 3 ways as a sum of consecutive naturals, for example, 361384 + ... + 369529.

It is an arithmetic number, because the mean of its divisors is an integer number (744435909).

Almost surely, 2^2977008649 is an apocalyptic number.

It is an amenable number.

2977008649 is a deficient number, since it is larger than the sum of its proper divisors (734987).

2977008649 is an equidigital number, since it uses as much as digits as its factorization.

2977008649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734986.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 2977008649 is about 54561.9707213733. The cubic root of 2977008649 is about 1438.5557550747. Note that the first 3 decimals are identical.

The spelling of 2977008649 in words is "two billion, nine hundred seventy-seven million, eight thousand, six hundred forty-nine".