711328781 has 2 divisors, whose sum is σ = 711328782. Its totient is φ = 711328780.

The previous prime is 711328777. The next prime is 711328799. The reversal of 711328781 is 187823117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 668687881 + 42640900 = 25859^2 + 6530^2 .

It is an emirp because it is prime and its reverse (187823117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 711328781 - 2² = 711328777 is a prime.

It is a super-2 number, since 2×711328781² = 1011977269357891922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (711328081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355664390 + 355664391.

It is an arithmetic number, because the mean of its divisors is an integer number (355664391).

Almost surely, 2^711328781 is an apocalyptic number.

It is an amenable number.

711328781 is a deficient number, since it is larger than the sum of its proper divisors (1).

711328781 is an equidigital number, since it uses as much as digits as its factorization.

711328781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 38.

The square root of 711328781 is about 26670.7476648106. The cubic root of 711328781 is about 892.6683296079.

The spelling of 711328781 in words is "seven hundred eleven million, three hundred twenty-eight thousand, seven hundred eighty-one".