1209463999 has 2 divisors, whose sum is σ = 1209464000. Its totient is φ = 1209463998.

The previous prime is 1209463979. The next prime is 1209464021. The reversal of 1209463999 is 9993649021.

It is a weak prime.

It is an emirp because it is prime and its reverse (9993649021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1209463999 - 2²¹ = 1207366847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209463939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604731999 + 604732000.

It is an arithmetic number, because the mean of its divisors is an integer number (604732000).

Almost surely, 2^1209463999 is an apocalyptic number.

1209463999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209463999 is an equidigital number, since it uses as much as digits as its factorization.

1209463999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 52.

The square root of 1209463999 is about 34777.3489357656. The cubic root of 1209463999 is about 1065.4448681103. Note that the first 3 decimals are identical.

The spelling of 1209463999 in words is "one billion, two hundred nine million, four hundred sixty-three thousand, nine hundred ninety-nine".