4878678997 has 2 divisors, whose sum is σ = 4878678998. Its totient is φ = 4878678996.

The previous prime is 4878678967. The next prime is 4878679009. The reversal of 4878678997 is 7998768784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4640470641 + 238208356 = 68121^2 + 15434^2 .

It is a cyclic number.

It is not a de Polignac number, because 4878678997 - 2¹⁵ = 4878646229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4878678947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2439339498 + 2439339499.

It is an arithmetic number, because the mean of its divisors is an integer number (2439339499).

Almost surely, 2^4878678997 is an apocalyptic number.

It is an amenable number.

4878678997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4878678997 is an equidigital number, since it uses as much as digits as its factorization.

4878678997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 341397504, while the sum is 73.

The square root of 4878678997 is about 69847.5410948732. The cubic root of 4878678997 is about 1696.0321529454.

The spelling of 4878678997 in words is "four billion, eight hundred seventy-eight million, six hundred seventy-eight thousand, nine hundred ninety-seven".