19688153 has 2 divisors, whose sum is σ = 19688154. Its totient is φ = 19688152.

The previous prime is 19688147. The next prime is 19688167. The reversal of 19688153 is 35188691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12306064 + 7382089 = 3508^2 + 2717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19688153 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19688153.

It is not a weakly prime, because it can be changed into another prime (19688183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844076 + 9844077.

It is an arithmetic number, because the mean of its divisors is an integer number (9844077).

Almost surely, 2^19688153 is an apocalyptic number.

It is an amenable number.

19688153 is a deficient number, since it is larger than the sum of its proper divisors (1).

19688153 is an equidigital number, since it uses as much as digits as its factorization.

19688153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 19688153 is about 4437.1334214783. The cubic root of 19688153 is about 270.0235599011.

The spelling of 19688153 in words is "nineteen million, six hundred eighty-eight thousand, one hundred fifty-three".