4977821879 has 2 divisors, whose sum is σ = 4977821880. Its totient is φ = 4977821878.

The previous prime is 4977821819. The next prime is 4977821909. The reversal of 4977821879 is 9781287794.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4977821879 - 2⁸ = 4977821623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4977821819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2488910939 + 2488910940.

It is an arithmetic number, because the mean of its divisors is an integer number (2488910940).

Almost surely, 2^4977821879 is an apocalyptic number.

4977821879 is a deficient number, since it is larger than the sum of its proper divisors (1).

4977821879 is an equidigital number, since it uses as much as digits as its factorization.

4977821879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14224896, while the sum is 62.

The square root of 4977821879 is about 70553.6808323988. The cubic root of 4977821879 is about 1707.4439290553.

The spelling of 4977821879 in words is "four billion, nine hundred seventy-seven million, eight hundred twenty-one thousand, eight hundred seventy-nine".