711208649 has 2 divisors, whose sum is σ = 711208650. Its totient is φ = 711208648.

The previous prime is 711208637. The next prime is 711208679. The reversal of 711208649 is 946802117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669153424 + 42055225 = 25868^2 + 6485^2 .

It is an emirp because it is prime and its reverse (946802117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 711208649 - 2¹² = 711204553 is a prime.

It is not a weakly prime, because it can be changed into another prime (711208679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355604324 + 355604325.

It is an arithmetic number, because the mean of its divisors is an integer number (355604325).

Almost surely, 2^711208649 is an apocalyptic number.

It is an amenable number.

711208649 is a deficient number, since it is larger than the sum of its proper divisors (1).

711208649 is an equidigital number, since it uses as much as digits as its factorization.

711208649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 711208649 is about 26668.4954393757. The cubic root of 711208649 is about 892.6180743335.

The spelling of 711208649 in words is "seven hundred eleven million, two hundred eight thousand, six hundred forty-nine".