19672117 has 2 divisors, whose sum is σ = 19672118. Its totient is φ = 19672116.

The previous prime is 19672109. The next prime is 19672171. The reversal of 19672117 is 71127691.

Together with next prime (19672171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 8071281 = 3406^2 + 2841^2 .

It is a cyclic number.

It is not a de Polignac number, because 19672117 - 2³ = 19672109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19672217) 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 as a sum of consecutive naturals, namely, 9836058 + 9836059.

It is an arithmetic number, because the mean of its divisors is an integer number (9836059).

Almost surely, 2^19672117 is an apocalyptic number.

It is an amenable number.

19672117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19672117 is an equidigital number, since it uses as much as digits as its factorization.

19672117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 34.

The square root of 19672117 is about 4435.3260308573. The cubic root of 19672117 is about 269.9502285944.

The spelling of 19672117 in words is "nineteen million, six hundred seventy-two thousand, one hundred seventeen".