711994721 has 2 divisors, whose sum is σ = 711994722. Its totient is φ = 711994720.

The previous prime is 711994691. The next prime is 711994727. The reversal of 711994721 is 127499117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704371600 + 7623121 = 26540^2 + 2761^2 .

It is an emirp because it is prime and its reverse (127499117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 711994721 - 2¹⁸ = 711732577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (711994727) 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, 355997360 + 355997361.

It is an arithmetic number, because the mean of its divisors is an integer number (355997361).

Almost surely, 2^711994721 is an apocalyptic number.

It is an amenable number.

711994721 is a deficient number, since it is larger than the sum of its proper divisors (1).

711994721 is an equidigital number, since it uses as much as digits as its factorization.

711994721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 41.

The square root of 711994721 is about 26683.2292086247. The cubic root of 711994721 is about 892.9468122398.

The spelling of 711994721 in words is "seven hundred eleven million, nine hundred ninety-four thousand, seven hundred twenty-one".