19097 has 6 divisors (see below), whose sum is σ = 20862. Its totient is φ = 17472.

The previous prime is 19087. The next prime is 19121. The reversal of 19097 is 79091.

It can be written as a sum of positive squares in 3 ways, for example, as 1936 + 17161 = 44^2 + 131^2 .

It is not a de Polignac number, because 19097 - 2⁴ = 19081 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113 + ... + 225.

It is an arithmetic number, because the mean of its divisors is an integer number (3477).

2¹⁹⁰⁹⁷ is an apocalyptic number.

19097 is the 113-rd pentagonal number.

It is an amenable number.

19097 is a deficient number, since it is larger than the sum of its proper divisors (1765).

19097 is a wasteful number, since it uses less digits than its factorization.

19097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 19097 is about 138.1918955656. The cubic root of 19097 is about 26.7293490717.

The spelling of 19097 in words is "nineteen thousand, ninety-seven".