711742721 has 2 divisors, whose sum is σ = 711742722. Its totient is φ = 711742720.

The previous prime is 711742709. The next prime is 711742727. The reversal of 711742721 is 127247117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657204496 + 54538225 = 25636^2 + 7385^2 .

It is a cyclic number.

It is not a de Polignac number, because 711742721 - 2²² = 707548417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (711742727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355871360 + 355871361.

It is an arithmetic number, because the mean of its divisors is an integer number (355871361).

Almost surely, 2^711742721 is an apocalyptic number.

It is an amenable number.

711742721 is a deficient number, since it is larger than the sum of its proper divisors (1).

711742721 is an equidigital number, since it uses as much as digits as its factorization.

711742721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5488, while the sum is 32.

The square root of 711742721 is about 26678.5067235781. The cubic root of 711742721 is about 892.8414513698.

Adding to 711742721 its reverse (127247117), we get a palindrome (838989838).

The spelling of 711742721 in words is "seven hundred eleven million, seven hundred forty-two thousand, seven hundred twenty-one".