28917523 has 2 divisors, whose sum is σ = 28917524. Its totient is φ = 28917522.

The previous prime is 28917521. The next prime is 28917533. The reversal of 28917523 is 32571982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28917523 - 2¹ = 28917521 is a prime.

Together with 28917521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28917521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458761 + 14458762.

It is an arithmetic number, because the mean of its divisors is an integer number (14458762).

Almost surely, 2^28917523 is an apocalyptic number.

28917523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917523 is an equidigital number, since it uses as much as digits as its factorization.

28917523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 28917523 is about 5377.5015574149. The cubic root of 28917523 is about 306.9401468480.

The spelling of 28917523 in words is "twenty-eight million, nine hundred seventeen thousand, five hundred twenty-three".