8971389 has 12 divisors (see below), whose sum is σ = 14810016. Its totient is φ = 5126472.

The previous prime is 8971381. The next prime is 8971397. The reversal of 8971389 is 9831798.

8971389 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8971381) and next prime (8971397).

It is not a de Polignac number, because 8971389 - 2³ = 8971381 is a prime.

8971389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8971381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71139 + ... + 71264.

It is an arithmetic number, because the mean of its divisors is an integer number (1234168).

Almost surely, 2^8971389 is an apocalyptic number.

It is an amenable number.

8971389 is a deficient number, since it is larger than the sum of its proper divisors (5838627).

8971389 is a wasteful number, since it uses less digits than its factorization.

8971389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142416 (or 142413 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 8971389 is about 2995.2277041988. The cubic root of 8971389 is about 207.7877287714.

The spelling of 8971389 in words is "eight million, nine hundred seventy-one thousand, three hundred eighty-nine".