19694713 has 2 divisors, whose sum is σ = 19694714. Its totient is φ = 19694712.

The previous prime is 19694707. The next prime is 19694729. The reversal of 19694713 is 31749691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 7744 = 4437^2 + 88^2 .

It is an emirp because it is prime and its reverse (31749691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19694713 - 2¹⁷ = 19563641 is a prime.

It is not a weakly prime, because it can be changed into another prime (19694113) 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, 9847356 + 9847357.

It is an arithmetic number, because the mean of its divisors is an integer number (9847357).

Almost surely, 2^19694713 is an apocalyptic number.

It is an amenable number.

19694713 is a deficient number, since it is larger than the sum of its proper divisors (1).

19694713 is an equidigital number, since it uses as much as digits as its factorization.

19694713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 19694713 is about 4437.8725759084. The cubic root of 19694713 is about 270.0535467644.

The spelling of 19694713 in words is "nineteen million, six hundred ninety-four thousand, seven hundred thirteen".