28901 has 2 divisors, whose sum is σ = 28902.
Its totient is φ = 28900.
The previous prime is 28879. The next prime is 28909. The reversal of 28901 is 10982.
It is a Cunningham number, because it is equal to 1702+1.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 28900 + 1 = 170^2 + 1^2
It is a cyclic number.
It is not a de Polignac number, because 28901 - 26 = 28837 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is a nialpdrome in base 14.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (28909) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14450 + 14451.
It is an arithmetic number, because the mean of its divisors is an integer number (14451).
228901 is an apocalyptic number.
It is an amenable number.
28901 is a deficient number, since it is larger than the sum of its proper divisors (1).
28901 is an equidigital number, since it uses as much as digits as its factorization.
28901 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 144, while the sum is 20.
The square root of 28901 is about 170.0029411510.
The cubic root of 28901 is about 30.6881675516.
It can be divided in two parts, 28 and 901, that added together give a palindrome (929).
The spelling of 28901 in words is "twenty-eight thousand, nine hundred one".