711723521 has 4 divisors (see below), whose sum is σ = 712970544. Its totient is φ = 710476500.

The previous prime is 711723503. The next prime is 711723533. The reversal of 711723521 is 125327117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125327117 = 2897 ⋅43261.

It is a cyclic number.

It is not a de Polignac number, because 711723521 - 2¹⁰ = 711722497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (711723421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622655 + ... + 623796.

It is an arithmetic number, because the mean of its divisors is an integer number (178242636).

Almost surely, 2^711723521 is an apocalyptic number.

It is an amenable number.

711723521 is a deficient number, since it is larger than the sum of its proper divisors (1247023).

711723521 is a wasteful number, since it uses less digits than its factorization.

711723521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247022.

The product of its digits is 2940, while the sum is 29.

The square root of 711723521 is about 26678.1468809211. The cubic root of 711723521 is about 892.8334228554.

The spelling of 711723521 in words is "seven hundred eleven million, seven hundred twenty-three thousand, five hundred twenty-one".