1234456609 has 2 divisors, whose sum is σ = 1234456610. Its totient is φ = 1234456608.

The previous prime is 1234456603. The next prime is 1234456631. The reversal of 1234456609 is 9066544321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950365584 + 284091025 = 30828^2 + 16855^2 .

It is an emirp because it is prime and its reverse (9066544321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1234456609 - 2¹¹ = 1234454561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1234456603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617228304 + 617228305.

It is an arithmetic number, because the mean of its divisors is an integer number (617228305).

Almost surely, 2^1234456609 is an apocalyptic number.

It is an amenable number.

1234456609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234456609 is an equidigital number, since it uses as much as digits as its factorization.

1234456609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 1234456609 is about 35134.8346943600. The cubic root of 1234456609 is about 1072.7337464851.

The spelling of 1234456609 in words is "one billion, two hundred thirty-four million, four hundred fifty-six thousand, six hundred nine".