28317097 has 4 divisors (see below), whose sum is σ = 28331856. Its totient is φ = 28302340.

The previous prime is 28317017. The next prime is 28317119. The reversal of 28317097 is 79071382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28317097 - 2⁷ = 28316969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28317007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3979 + ... + 8512.

It is an arithmetic number, because the mean of its divisors is an integer number (7082964).

Almost surely, 2^28317097 is an apocalyptic number.

It is an amenable number.

28317097 is a deficient number, since it is larger than the sum of its proper divisors (14759).

28317097 is a wasteful number, since it uses less digits than its factorization.

28317097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14758.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 28317097 is about 5321.3811177175. The cubic root of 28317097 is about 304.8008984538.

The spelling of 28317097 in words is "twenty-eight million, three hundred seventeen thousand, ninety-seven".