1969729 has 2 divisors, whose sum is σ = 1969730. Its totient is φ = 1969728.

The previous prime is 1969699. The next prime is 1969741. The reversal of 1969729 is 9279691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 565504 = 1185^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969729 - 2¹³ = 1961537 is a prime.

1969729 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1969829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984864 + 984865.

It is an arithmetic number, because the mean of its divisors is an integer number (984865).

2^1969729 is an apocalyptic number.

It is an amenable number.

1969729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969729 is an equidigital number, since it uses as much as digits as its factorization.

1969729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 1969729 is about 1403.4703416888. The cubic root of 1969729 is about 125.3532196138.

The spelling of 1969729 in words is "one million, nine hundred sixty-nine thousand, seven hundred twenty-nine".