2921894804 has 6 divisors (see below), whose sum is σ = 5113315914. Its totient is φ = 1460947400.

The previous prime is 2921894791. The next prime is 2921894809. The reversal of 2921894804 is 4084981292.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2873174404 + 48720400 = 53602^2 + 6980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921894809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365236847 + ... + 365236854.

It is an arithmetic number, because the mean of its divisors is an integer number (852219319).

Almost surely, 2^2921894804 is an apocalyptic number.

It is an amenable number.

2921894804 is a deficient number, since it is larger than the sum of its proper divisors (2191421110).

2921894804 is a wasteful number, since it uses less digits than its factorization.

2921894804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730473705 (or 730473703 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 2921894804 is about 54054.5539617154. The cubic root of 2921894804 is about 1429.6229961217.

The spelling of 2921894804 in words is "two billion, nine hundred twenty-one million, eight hundred ninety-four thousand, eight hundred four".