8971399 has 2 divisors, whose sum is σ = 8971400. Its totient is φ = 8971398.

The previous prime is 8971397. The next prime is 8971421. The reversal of 8971399 is 9931798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8971399 - 2¹ = 8971397 is a prime.

Together with 8971397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8971397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4485699 + 4485700.

It is an arithmetic number, because the mean of its divisors is an integer number (4485700).

Almost surely, 2^8971399 is an apocalyptic number.

8971399 is a deficient number, since it is larger than the sum of its proper divisors (1).

8971399 is an equidigital number, since it uses as much as digits as its factorization.

8971399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 8971399 is about 2995.2293735205. The cubic root of 8971399 is about 207.7878059753.

The spelling of 8971399 in words is "eight million, nine hundred seventy-one thousand, three hundred ninety-nine".