2878091939 has 2 divisors, whose sum is σ = 2878091940. Its totient is φ = 2878091938.

The previous prime is 2878091929. The next prime is 2878091963. The reversal of 2878091939 is 9391908782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2878091939 - 2²⁰ = 2877043363 is a prime.

It is not a weakly prime, because it can be changed into another prime (2878091929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439045969 + 1439045970.

It is an arithmetic number, because the mean of its divisors is an integer number (1439045970).

Almost surely, 2^2878091939 is an apocalyptic number.

2878091939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878091939 is an equidigital number, since it uses as much as digits as its factorization.

2878091939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 2878091939 is about 53647.8512058032. The cubic root of 2878091939 is about 1422.4430500951.

The spelling of 2878091939 in words is "two billion, eight hundred seventy-eight million, ninety-one thousand, nine hundred thirty-nine".