712779857 has 2 divisors, whose sum is σ = 712779858. Its totient is φ = 712779856.

The previous prime is 712779841. The next prime is 712779883. The reversal of 712779857 is 758977217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608658241 + 104121616 = 24671^2 + 10204^2 .

It is a cyclic number.

It is not a de Polignac number, because 712779857 - 2⁴ = 712779841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 712779799 and 712779808.

It is not a weakly prime, because it can be changed into another prime (712779827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356389928 + 356389929.

It is an arithmetic number, because the mean of its divisors is an integer number (356389929).

Almost surely, 2^712779857 is an apocalyptic number.

It is an amenable number.

712779857 is a deficient number, since it is larger than the sum of its proper divisors (1).

712779857 is an equidigital number, since it uses as much as digits as its factorization.

712779857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728720, while the sum is 53.

The square root of 712779857 is about 26697.9373173285. The cubic root of 712779857 is about 893.2749172682.

The spelling of 712779857 in words is "seven hundred twelve million, seven hundred seventy-nine thousand, eight hundred fifty-seven".