2923784921 has 2 divisors, whose sum is σ = 2923784922. Its totient is φ = 2923784920.

The previous prime is 2923784917. The next prime is 2923784987. The reversal of 2923784921 is 1294873292.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2920321600 + 3463321 = 54040^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2923784921 - 2² = 2923784917 is a prime.

It is not a weakly prime, because it can be changed into another prime (2923784621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1461892460 + 1461892461.

It is an arithmetic number, because the mean of its divisors is an integer number (1461892461).

Almost surely, 2^2923784921 is an apocalyptic number.

It is an amenable number.

2923784921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2923784921 is an equidigital number, since it uses as much as digits as its factorization.

2923784921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 2923784921 is about 54072.0345557664. The cubic root of 2923784921 is about 1429.9311947921.

The spelling of 2923784921 in words is "two billion, nine hundred twenty-three million, seven hundred eighty-four thousand, nine hundred twenty-one".