711649 has 2 divisors, whose sum is σ = 711650. Its totient is φ = 711648.

The previous prime is 711629. The next prime is 711653. The reversal of 711649 is 946117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360000 + 351649 = 600^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 711649 - 2⁵ = 711617 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (711629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355824 + 355825.

It is an arithmetic number, because the mean of its divisors is an integer number (355825).

2⁷¹¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

711649 is a deficient number, since it is larger than the sum of its proper divisors (1).

711649 is an equidigital number, since it uses as much as digits as its factorization.

711649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 711649 is about 843.5929113026. The cubic root of 711649 is about 89.2802260398.

The spelling of 711649 in words is "seven hundred eleven thousand, six hundred forty-nine".