28971359 has 2 divisors, whose sum is σ = 28971360. Its totient is φ = 28971358.

The previous prime is 28971323. The next prime is 28971361. The reversal of 28971359 is 95317982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28971359 is a prime.

Together with 28971361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28973359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14485679 + 14485680.

It is an arithmetic number, because the mean of its divisors is an integer number (14485680).

Almost surely, 2^28971359 is an apocalyptic number.

28971359 is a deficient number, since it is larger than the sum of its proper divisors (1).

28971359 is an equidigital number, since it uses as much as digits as its factorization.

28971359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 28971359 is about 5382.5049001371. The cubic root of 28971359 is about 307.1305064647.

The spelling of 28971359 in words is "twenty-eight million, nine hundred seventy-one thousand, three hundred fifty-nine".