108668139479 has 2 divisors, whose sum is σ = 108668139480. Its totient is φ = 108668139478.

The previous prime is 108668139457. The next prime is 108668139493. The reversal of 108668139479 is 974931866801.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108668139479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108668139439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54334069739 + 54334069740.

It is an arithmetic number, because the mean of its divisors is an integer number (54334069740).

Almost surely, 2^108668139479 is an apocalyptic number.

108668139479 is a deficient number, since it is larger than the sum of its proper divisors (1).

108668139479 is an equidigital number, since it uses as much as digits as its factorization.

108668139479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 108668139479 in words is "one hundred eight billion, six hundred sixty-eight million, one hundred thirty-nine thousand, four hundred seventy-nine".