57684784979 has 2 divisors, whose sum is σ = 57684784980. Its totient is φ = 57684784978.

The previous prime is 57684784973. The next prime is 57684784981. The reversal of 57684784979 is 97948748675.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57684784979 is a prime.

Together with 57684784981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57684784973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28842392489 + 28842392490.

It is an arithmetic number, because the mean of its divisors is an integer number (28842392490).

Almost surely, 2^57684784979 is an apocalyptic number.

57684784979 is a deficient number, since it is larger than the sum of its proper divisors (1).

57684784979 is an equidigital number, since it uses as much as digits as its factorization.

57684784979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 853493760, while the sum is 74.

The spelling of 57684784979 in words is "fifty-seven billion, six hundred eighty-four million, seven hundred eighty-four thousand, nine hundred seventy-nine".