28713523 has 2 divisors, whose sum is σ = 28713524. Its totient is φ = 28713522.

The previous prime is 28713521. The next prime is 28713539. The reversal of 28713523 is 32531782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28713523 - 2¹ = 28713521 is a prime.

Together with 28713521, it forms a pair of twin primes.

It is the 5359-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (28713521) by changing a digit.

It is a nontrivial repunit in base 5358.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14356761 + 14356762.

It is an arithmetic number, because the mean of its divisors is an integer number (14356762).

Almost surely, 2^28713523 is an apocalyptic number.

28713523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28713523 is an equidigital number, since it uses as much as digits as its factorization.

28713523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 28713523 is about 5358.5000699823. The cubic root of 28713523 is about 306.2166684257.

The spelling of 28713523 in words is "twenty-eight million, seven hundred thirteen thousand, five hundred twenty-three".