1231063609 has 2 divisors, whose sum is σ = 1231063610. Its totient is φ = 1231063608.

The previous prime is 1231063597. The next prime is 1231063657. The reversal of 1231063609 is 9063601321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752679225 + 478384384 = 27435^2 + 21872^2 .

It is an emirp because it is prime and its reverse (9063601321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231063609 - 2²¹ = 1228966457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231063709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615531804 + 615531805.

It is an arithmetic number, because the mean of its divisors is an integer number (615531805).

Almost surely, 2^1231063609 is an apocalyptic number.

It is an amenable number.

1231063609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231063609 is an equidigital number, since it uses as much as digits as its factorization.

1231063609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1231063609 is about 35086.5160567418. The cubic root of 1231063609 is about 1071.7500139340.

The spelling of 1231063609 in words is "one billion, two hundred thirty-one million, sixty-three thousand, six hundred nine".