4778138039 has 2 divisors, whose sum is σ = 4778138040. Its totient is φ = 4778138038.

The previous prime is 4778138023. The next prime is 4778138051. The reversal of 4778138039 is 9308318774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4778138039 - 2⁴ = 4778138023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4778138009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2389069019 + 2389069020.

It is an arithmetic number, because the mean of its divisors is an integer number (2389069020).

Almost surely, 2^4778138039 is an apocalyptic number.

4778138039 is a deficient number, since it is larger than the sum of its proper divisors (1).

4778138039 is an equidigital number, since it uses as much as digits as its factorization.

4778138039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 4778138039 is about 69124.0771294634. The cubic root of 4778138039 is about 1684.3004476644.

The spelling of 4778138039 in words is "four billion, seven hundred seventy-eight million, one hundred thirty-eight thousand, thirty-nine".