28917151 has 2 divisors, whose sum is σ = 28917152. Its totient is φ = 28917150.

The previous prime is 28917101. The next prime is 28917179. The reversal of 28917151 is 15171982.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28917151 - 2⁹ = 28916639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28917101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458575 + 14458576.

It is an arithmetic number, because the mean of its divisors is an integer number (14458576).

Almost surely, 2^28917151 is an apocalyptic number.

28917151 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917151 is an equidigital number, since it uses as much as digits as its factorization.

28917151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 34.

The square root of 28917151 is about 5377.4669687502. The cubic root of 28917151 is about 306.9388306653.

The spelling of 28917151 in words is "twenty-eight million, nine hundred seventeen thousand, one hundred fifty-one".