28170133 has 2 divisors, whose sum is σ = 28170134. Its totient is φ = 28170132.

The previous prime is 28170127. The next prime is 28170151. The reversal of 28170133 is 33107182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 9012004 = 4377^2 + 3002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28170133 is a prime.

It is equal to p_1751353 and since 28170133 and 1751353 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 28170098 and 28170107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28170113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14085066 + 14085067.

It is an arithmetic number, because the mean of its divisors is an integer number (14085067).

Almost surely, 2^28170133 is an apocalyptic number.

It is an amenable number.

28170133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28170133 is an equidigital number, since it uses as much as digits as its factorization.

28170133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 28170133 is about 5307.5543332122. The cubic root of 28170133 is about 304.2726842625.

The spelling of 28170133 in words is "twenty-eight million, one hundred seventy thousand, one hundred thirty-three".