1240436723 has 2 divisors, whose sum is σ = 1240436724. Its totient is φ = 1240436722.

The previous prime is 1240436711. The next prime is 1240436753. The reversal of 1240436723 is 3276340421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240436723 - 2²⁰ = 1239388147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240436723.

It is not a weakly prime, because it can be changed into another prime (1240436753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620218361 + 620218362.

It is an arithmetic number, because the mean of its divisors is an integer number (620218362).

Almost surely, 2^1240436723 is an apocalyptic number.

1240436723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240436723 is an equidigital number, since it uses as much as digits as its factorization.

1240436723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 1240436723 is about 35219.8342273214. The cubic root of 1240436723 is about 1074.4631819130.

The spelling of 1240436723 in words is "one billion, two hundred forty million, four hundred thirty-six thousand, seven hundred twenty-three".