1234240009 has 2 divisors, whose sum is σ = 1234240010. Its totient is φ = 1234240008.

The previous prime is 1234239863. The next prime is 1234240061. The reversal of 1234240009 is 9000424321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862714384 + 371525625 = 29372^2 + 19275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234240009 - 2¹⁷ = 1234108937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1234247009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617120004 + 617120005.

It is an arithmetic number, because the mean of its divisors is an integer number (617120005).

Almost surely, 2^1234240009 is an apocalyptic number.

It is an amenable number.

1234240009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234240009 is an equidigital number, since it uses as much as digits as its factorization.

1234240009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1234240009 is about 35131.7521481636. The cubic root of 1234240009 is about 1072.6710015443.

The spelling of 1234240009 in words is "one billion, two hundred thirty-four million, two hundred forty thousand, nine".