2956838921 has 4 divisors (see below), whose sum is σ = 2959560192. Its totient is φ = 2954117652.

The previous prime is 2956838903. The next prime is 2956838977. The reversal of 2956838921 is 1298386592.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2956838921 - 2¹⁴ = 2956822537 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 (2956838981) 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, 1359005 + ... + 1361178.

It is an arithmetic number, because the mean of its divisors is an integer number (739890048).

Almost surely, 2^2956838921 is an apocalyptic number.

It is an amenable number.

2956838921 is a deficient number, since it is larger than the sum of its proper divisors (2721271).

2956838921 is a wasteful number, since it uses less digits than its factorization.

2956838921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721270.

The product of its digits is 1866240, while the sum is 53.

The square root of 2956838921 is about 54376.8233809221. The cubic root of 2956838921 is about 1435.2995721898.

The spelling of 2956838921 in words is "two billion, nine hundred fifty-six million, eight hundred thirty-eight thousand, nine hundred twenty-one".