84680464879 has 2 divisors, whose sum is σ = 84680464880. Its totient is φ = 84680464878.

The previous prime is 84680464877. The next prime is 84680464907. The reversal of 84680464879 is 97846408648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84680464879 - 2¹ = 84680464877 is a prime.

It is a super-2 number, since 2×84680464879² (a number of 23 digits) contains 22 as substring.

Together with 84680464877, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 84680464879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84680464873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42340232439 + 42340232440.

It is an arithmetic number, because the mean of its divisors is an integer number (42340232440).

Almost surely, 2^84680464879 is an apocalyptic number.

84680464879 is a deficient number, since it is larger than the sum of its proper divisors (1).

84680464879 is an equidigital number, since it uses as much as digits as its factorization.

84680464879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74317824, while the sum is 64.

The spelling of 84680464879 in words is "eighty-four billion, six hundred eighty million, four hundred sixty-four thousand, eight hundred seventy-nine".