1013440123 has 2 divisors, whose sum is σ = 1013440124. Its totient is φ = 1013440122.

The previous prime is 1013440117. The next prime is 1013440147. The reversal of 1013440123 is 3210443101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013440123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1013440123.

It is not a weakly prime, because it can be changed into another prime (1013444123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506720061 + 506720062.

It is an arithmetic number, because the mean of its divisors is an integer number (506720062).

Almost surely, 2^1013440123 is an apocalyptic number.

1013440123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013440123 is an equidigital number, since it uses as much as digits as its factorization.

1013440123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1013440123 is about 31834.5743335764. The cubic root of 1013440123 is about 1004.4601187661.

Adding to 1013440123 its reverse (3210443101), we get a palindrome (4223883224).

The spelling of 1013440123 in words is "one billion, thirteen million, four hundred forty thousand, one hundred twenty-three".