19631369 has 2 divisors, whose sum is σ = 19631370. Its totient is φ = 19631368.

The previous prime is 19631357. The next prime is 19631393. The reversal of 19631369 is 96313691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14341369 + 5290000 = 3787^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 19631369 - 2²⁰ = 18582793 is a prime.

It is a super-2 number, since 2×19631369² = 770781297628322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19631309) 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, 9815684 + 9815685.

It is an arithmetic number, because the mean of its divisors is an integer number (9815685).

Almost surely, 2^19631369 is an apocalyptic number.

It is an amenable number.

19631369 is a deficient number, since it is larger than the sum of its proper divisors (1).

19631369 is an equidigital number, since it uses as much as digits as its factorization.

19631369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 19631369 is about 4430.7300752810. The cubic root of 19631369 is about 269.7637118848.

The spelling of 19631369 in words is "nineteen million, six hundred thirty-one thousand, three hundred sixty-nine".