711128889 has 15 divisors (see below), whose sum is σ = 1062662293. Its totient is φ = 473925924.

The previous prime is 711128837. The next prime is 711128897. The reversal of 711128889 is 988821117.

It is a happy number.

The square root of 711128889 is 26667.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 711128889 - 2¹⁵ = 711096121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (711129889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 238522 + ... + 241484.

Almost surely, 2^711128889 is an apocalyptic number.

711128889 is the 26667-th square number.

711128889 is the 13334-th centered octagonal number.

It is an amenable number.

711128889 is a deficient number, since it is larger than the sum of its proper divisors (351533404).

711128889 is an frugal number, since it uses more digits than its factorization.

711128889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5938 (or 2966 counting only the distinct ones).

The product of its digits is 64512, while the sum is 45.

The cubic root of 711128889 is about 892.5847049046.

It can be divided in two parts, 711 and 128889, that added together give a square (129600 = 360²).

The spelling of 711128889 in words is "seven hundred eleven million, one hundred twenty-eight thousand, eight hundred eighty-nine".