19698799 has 2 divisors, whose sum is σ = 19698800. Its totient is φ = 19698798.

The previous prime is 19698797. The next prime is 19698817. The reversal of 19698799 is 99789691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19698799 - 2¹ = 19698797 is a prime.

Together with 19698797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19698797) 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, 9849399 + 9849400.

It is an arithmetic number, because the mean of its divisors is an integer number (9849400).

Almost surely, 2^19698799 is an apocalyptic number.

19698799 is a deficient number, since it is larger than the sum of its proper divisors (1).

19698799 is an equidigital number, since it uses as much as digits as its factorization.

19698799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 58.

The square root of 19698799 is about 4438.3329077481. The cubic root of 19698799 is about 270.0722211922.

The spelling of 19698799 in words is "nineteen million, six hundred ninety-eight thousand, seven hundred ninety-nine".