2947838561 has 8 divisors (see below), whose sum is σ = 2964025344. Its totient is φ = 2931678720.

The previous prime is 2947838549. The next prime is 2947838617. The reversal of 2947838561 is 1658387492.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2947838561 - 2⁶ = 2947838497 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2947837561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236321 + ... + 248481.

It is an arithmetic number, because the mean of its divisors is an integer number (370503168).

Almost surely, 2^2947838561 is an apocalyptic number.

It is an amenable number.

2947838561 is a deficient number, since it is larger than the sum of its proper divisors (16186783).

2947838561 is a wasteful number, since it uses less digits than its factorization.

2947838561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471.

The product of its digits is 2903040, while the sum is 53.

The square root of 2947838561 is about 54294.0011511401. The cubic root of 2947838561 is about 1433.8417831209.

The spelling of 2947838561 in words is "two billion, nine hundred forty-seven million, eight hundred thirty-eight thousand, five hundred sixty-one".