2878243421 has 2 divisors, whose sum is σ = 2878243422. Its totient is φ = 2878243420.

The previous prime is 2878243411. The next prime is 2878243451. The reversal of 2878243421 is 1243428782.

2878243421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2773180921 + 105062500 = 52661^2 + 10250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878243421 - 2¹⁰ = 2878242397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2878243411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439121710 + 1439121711.

It is an arithmetic number, because the mean of its divisors is an integer number (1439121711).

Almost surely, 2^2878243421 is an apocalyptic number.

It is an amenable number.

2878243421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878243421 is an equidigital number, since it uses as much as digits as its factorization.

2878243421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 41.

The square root of 2878243421 is about 53649.2630051895. The cubic root of 2878243421 is about 1422.4680053713.

The spelling of 2878243421 in words is "two billion, eight hundred seventy-eight million, two hundred forty-three thousand, four hundred twenty-one".