19109097 has 48 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 10423296.

The previous prime is 19109089. The next prime is 19109141. The reversal of 19109097 is 79090191.

It is not a de Polignac number, because 19109097 - 2³ = 19109089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19109017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196953 + ... + 197049.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^19109097 is an apocalyptic number.

It is an amenable number.

19109097 is a deficient number, since it is larger than the sum of its proper divisors (13912983).

19109097 is a wasteful number, since it uses less digits than its factorization.

19109097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 19109097 is about 4371.3953149995. The cubic root of 19109097 is about 267.3499178495.

The spelling of 19109097 in words is "nineteen million, one hundred nine thousand, ninety-seven".