19984417 has 2 divisors, whose sum is σ = 19984418. Its totient is φ = 19984416.

The previous prime is 19984381. The next prime is 19984423. The reversal of 19984417 is 71448991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 57121 = 4464^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 19984417 - 2²³ = 11595809 is a prime.

It is not a weakly prime, because it can be changed into another prime (19984427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992208 + 9992209.

It is an arithmetic number, because the mean of its divisors is an integer number (9992209).

Almost surely, 2^19984417 is an apocalyptic number.

It is an amenable number.

19984417 is a deficient number, since it is larger than the sum of its proper divisors (1).

19984417 is an equidigital number, since it uses as much as digits as its factorization.

19984417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 19984417 is about 4470.3933831376. The cubic root of 19984417 is about 271.3712453925.

The spelling of 19984417 in words is "nineteen million, nine hundred eighty-four thousand, four hundred seventeen".