1443920669 has 2 divisors, whose sum is σ = 1443920670. Its totient is φ = 1443920668.

The previous prime is 1443920659. The next prime is 1443920719. The reversal of 1443920669 is 9660293441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1131515044 + 312405625 = 33638^2 + 17675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1443920669 is a prime.

It is a super-2 number, since 2×1443920669² = 4169813796730815122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1443920609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721960334 + 721960335.

It is an arithmetic number, because the mean of its divisors is an integer number (721960335).

Almost surely, 2^1443920669 is an apocalyptic number.

It is an amenable number.

1443920669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1443920669 is an equidigital number, since it uses as much as digits as its factorization.

1443920669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1443920669 is about 37998.9561567157. The cubic root of 1443920669 is about 1130.2671644904.

The spelling of 1443920669 in words is "one billion, four hundred forty-three million, nine hundred twenty thousand, six hundred sixty-nine".