84977769179 has 2 divisors, whose sum is σ = 84977769180. Its totient is φ = 84977769178.

The previous prime is 84977769137. The next prime is 84977769181. The reversal of 84977769179 is 97196777948.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84977769179 is a prime.

Together with 84977769181, 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 (84977769109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42488884589 + 42488884590.

It is an arithmetic number, because the mean of its divisors is an integer number (42488884590).

Almost surely, 2^84977769179 is an apocalyptic number.

84977769179 is a deficient number, since it is larger than the sum of its proper divisors (1).

84977769179 is an equidigital number, since it uses as much as digits as its factorization.

84977769179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336063168, while the sum is 74.

It can be divided in two parts, 84977769 and 179, that added together give a palindrome (84977948).

The spelling of 84977769179 in words is "eighty-four billion, nine hundred seventy-seven million, seven hundred sixty-nine thousand, one hundred seventy-nine".