705029123081 has 2 divisors, whose sum is σ = 705029123082. Its totient is φ = 705029123080.

The previous prime is 705029123077. The next prime is 705029123159. The reversal of 705029123081 is 180321920507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520937497600 + 184091625481 = 721760^2 + 429059^2 .

It is an emirp because it is prime and its reverse (180321920507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705029123081 - 2² = 705029123077 is a prime.

It is a super-2 number, since 2×705029123081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (705029128081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352514561540 + 352514561541.

It is an arithmetic number, because the mean of its divisors is an integer number (352514561541).

Almost surely, 2^705029123081 is an apocalyptic number.

It is an amenable number.

705029123081 is a deficient number, since it is larger than the sum of its proper divisors (1).

705029123081 is an equidigital number, since it uses as much as digits as its factorization.

705029123081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 705029123081 in words is "seven hundred five billion, twenty-nine million, one hundred twenty-three thousand, eighty-one".