83856992729 has 2 divisors, whose sum is σ = 83856992730. Its totient is φ = 83856992728.

The previous prime is 83856992719. The next prime is 83856992749. The reversal of 83856992729 is 92729965838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76550162329 + 7306830400 = 276677^2 + 85480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83856992729 is a prime.

It is not a weakly prime, because it can be changed into another prime (83856992719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41928496364 + 41928496365.

It is an arithmetic number, because the mean of its divisors is an integer number (41928496365).

Almost surely, 2^83856992729 is an apocalyptic number.

It is an amenable number.

83856992729 is a deficient number, since it is larger than the sum of its proper divisors (1).

83856992729 is an equidigital number, since it uses as much as digits as its factorization.

83856992729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 68.

The spelling of 83856992729 in words is "eighty-three billion, eight hundred fifty-six million, nine hundred ninety-two thousand, seven hundred twenty-nine".