2878145129 has 2 divisors, whose sum is σ = 2878145130. Its totient is φ = 2878145128.

The previous prime is 2878145113. The next prime is 2878145131. The reversal of 2878145129 is 9215418782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2507505625 + 370639504 = 50075^2 + 19252^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878145129 - 2⁴ = 2878145113 is a prime.

Together with 2878145131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2878145189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439072564 + 1439072565.

It is an arithmetic number, because the mean of its divisors is an integer number (1439072565).

Almost surely, 2^2878145129 is an apocalyptic number.

It is an amenable number.

2878145129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878145129 is an equidigital number, since it uses as much as digits as its factorization.

2878145129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 47.

The square root of 2878145129 is about 53648.3469363223. The cubic root of 2878145129 is about 1422.4518127616.

The spelling of 2878145129 in words is "two billion, eight hundred seventy-eight million, one hundred forty-five thousand, one hundred twenty-nine".