711775989 has 6 divisors (see below), whose sum is σ = 1028120886. Its totient is φ = 474517320.

The previous prime is 711775973. The next prime is 711775997. The reversal of 711775989 is 989577117.

It can be written as a sum of positive squares in only one way, i.e., 603095364 + 108680625 = 24558^2 + 10425^2 .

It is not a de Polignac number, because 711775989 - 2⁴ = 711775973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (711775289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39543102 + ... + 39543119.

It is an arithmetic number, because the mean of its divisors is an integer number (171353481).

Almost surely, 2^711775989 is an apocalyptic number.

It is an amenable number.

711775989 is a deficient number, since it is larger than the sum of its proper divisors (316344897).

711775989 is a wasteful number, since it uses less digits than its factorization.

711775989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79086227 (or 79086224 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 54.

The square root of 711775989 is about 26679.1302144579. The cubic root of 711775989 is about 892.8553621017.

The spelling of 711775989 in words is "seven hundred eleven million, seven hundred seventy-five thousand, nine hundred eighty-nine".