1209023443 has 2 divisors, whose sum is σ = 1209023444. Its totient is φ = 1209023442.

The previous prime is 1209023407. The next prime is 1209023471. The reversal of 1209023443 is 3443209021.

It is an a-pointer prime, because the next prime (1209023471) can be obtained adding 1209023443 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1209023443 - 2¹³ = 1209015251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209020443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604511721 + 604511722.

It is an arithmetic number, because the mean of its divisors is an integer number (604511722).

Almost surely, 2^1209023443 is an apocalyptic number.

1209023443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209023443 is an equidigital number, since it uses as much as digits as its factorization.

1209023443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1209023443 is about 34771.0144085559. The cubic root of 1209023443 is about 1065.3154870693.

The spelling of 1209023443 in words is "one billion, two hundred nine million, twenty-three thousand, four hundred forty-three".