2947993841 has 4 divisors (see below), whose sum is σ = 3174762612. Its totient is φ = 2721225072.

The previous prime is 2947993837. The next prime is 2947993843. The reversal of 2947993841 is 1483997492.

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 258534241 + 2689459600 = 16079^2 + 51860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2947993841 - 2² = 2947993837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2947993843) 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 in 3 ways as a sum of consecutive naturals, for example, 113384366 + ... + 113384391.

It is an arithmetic number, because the mean of its divisors is an integer number (793690653).

Almost surely, 2^2947993841 is an apocalyptic number.

It is an amenable number.

2947993841 is a deficient number, since it is larger than the sum of its proper divisors (226768771).

2947993841 is a wasteful number, since it uses less digits than its factorization.

2947993841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226768770.

The product of its digits is 3919104, while the sum is 56.

The square root of 2947993841 is about 54295.4311245431. The cubic root of 2947993841 is about 1433.8669589729.

The spelling of 2947993841 in words is "two billion, nine hundred forty-seven million, nine hundred ninety-three thousand, eight hundred forty-one".