2894271921 has 24 divisors (see below), whose sum is σ = 4214808000. Its totient is φ = 1913779296.

The previous prime is 2894271917. The next prime is 2894271923. The reversal of 2894271921 is 1291724982.

It is not a de Polignac number, because 2894271921 - 2² = 2894271917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2894271923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 963580 + ... + 966578.

It is an arithmetic number, because the mean of its divisors is an integer number (175617000).

Almost surely, 2^2894271921 is an apocalyptic number.

It is an amenable number.

2894271921 is a deficient number, since it is larger than the sum of its proper divisors (1320536079).

2894271921 is a wasteful number, since it uses less digits than its factorization.

2894271921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845 (or 3842 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2894271921 is about 53798.4379048314. The cubic root of 2894271921 is about 1425.1036216430.

The spelling of 2894271921 in words is "two billion, eight hundred ninety-four million, two hundred seventy-one thousand, nine hundred twenty-one".