2894605921 has 4 divisors (see below), whose sum is σ = 2896661700. Its totient is φ = 2892550144.

The previous prime is 2894605919. The next prime is 2894605927. The reversal of 2894605921 is 1295064982.

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 9734400 + 2884871521 = 3120^2 + 53711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2894605921 - 2¹ = 2894605919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2894605927) 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, 1025776 + ... + 1028593.

It is an arithmetic number, because the mean of its divisors is an integer number (724165425).

Almost surely, 2^2894605921 is an apocalyptic number.

It is an amenable number.

2894605921 is a deficient number, since it is larger than the sum of its proper divisors (2055779).

2894605921 is a wasteful number, since it uses less digits than its factorization.

2894605921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055778.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 2894605921 is about 53801.5419946306. The cubic root of 2894605921 is about 1425.1584386878.

The spelling of 2894605921 in words is "two billion, eight hundred ninety-four million, six hundred five thousand, nine hundred twenty-one".