971128389 has 32 divisors (see below), whose sum is σ = 1621361664. Its totient is φ = 502289280.

The previous prime is 971128343. The next prime is 971128397. The reversal of 971128389 is 983821179.

It is not a de Polignac number, because 971128389 - 2⁷ = 971128261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971128339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44802 + ... + 62844.

It is an arithmetic number, because the mean of its divisors is an integer number (50667552).

Almost surely, 2^971128389 is an apocalyptic number.

It is an amenable number.

971128389 is a deficient number, since it is larger than the sum of its proper divisors (650233275).

971128389 is a wasteful number, since it uses less digits than its factorization.

971128389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18297.

The product of its digits is 217728, while the sum is 48.

The square root of 971128389 is about 31162.9329332141. The cubic root of 971128389 is about 990.2819959861.

It can be divided in two parts, 97112 and 8389, that added together give a palindrome (105501).

The spelling of 971128389 in words is "nine hundred seventy-one million, one hundred twenty-eight thousand, three hundred eighty-nine".