19699513 has 2 divisors, whose sum is σ = 19699514. Its totient is φ = 19699512.

The previous prime is 19699507. The next prime is 19699529. The reversal of 19699513 is 31599691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 12544 = 4437^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 19699513 - 2¹⁷ = 19568441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19699513.

It is not a weakly prime, because it can be changed into another prime (19699553) 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, 9849756 + 9849757.

It is an arithmetic number, because the mean of its divisors is an integer number (9849757).

Almost surely, 2^19699513 is an apocalyptic number.

It is an amenable number.

19699513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19699513 is an equidigital number, since it uses as much as digits as its factorization.

19699513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65610, while the sum is 43.

The square root of 19699513 is about 4438.4133426259. The cubic root of 19699513 is about 270.0754841532.

The spelling of 19699513 in words is "nineteen million, six hundred ninety-nine thousand, five hundred thirteen".