2878115987 has 2 divisors, whose sum is σ = 2878115988. Its totient is φ = 2878115986.

The previous prime is 2878115921. The next prime is 2878116001. The reversal of 2878115987 is 7895118782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2878115987 - 2¹⁸ = 2877853843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2878115917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439057993 + 1439057994.

It is an arithmetic number, because the mean of its divisors is an integer number (1439057994).

Almost surely, 2^2878115987 is an apocalyptic number.

2878115987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878115987 is an equidigital number, since it uses as much as digits as its factorization.

2878115987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 56.

The square root of 2878115987 is about 53648.0753336035. The cubic root of 2878115987 is about 1422.4470118420.

The spelling of 2878115987 in words is "two billion, eight hundred seventy-eight million, one hundred fifteen thousand, nine hundred eighty-seven".