19680769 has 2 divisors, whose sum is σ = 19680770. Its totient is φ = 19680768.

The previous prime is 19680743. The next prime is 19680823. The reversal of 19680769 is 96708691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16908544 + 2772225 = 4112^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 19680769 - 2⁷ = 19680641 is a prime.

It is a super-2 number, since 2×19680769² = 774665336862722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19680719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9840384 + 9840385.

It is an arithmetic number, because the mean of its divisors is an integer number (9840385).

Almost surely, 2^19680769 is an apocalyptic number.

It is an amenable number.

19680769 is a deficient number, since it is larger than the sum of its proper divisors (1).

19680769 is an equidigital number, since it uses as much as digits as its factorization.

19680769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 19680769 is about 4436.3012747107. The cubic root of 19680769 is about 269.9897984257.

It can be divided in two parts, 19680 and 769, that added together give a square (20449 = 143²).

The spelling of 19680769 in words is "nineteen million, six hundred eighty thousand, seven hundred sixty-nine".