1243415603623 has 2 divisors, whose sum is σ = 1243415603624. Its totient is φ = 1243415603622.

The previous prime is 1243415603597. The next prime is 1243415603657. The reversal of 1243415603623 is 3263065143421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243415603623 - 2¹³ = 1243415595431 is a prime.

It is a super-2 number, since 2×1243415603623² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243415603923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621707801811 + 621707801812.

It is an arithmetic number, because the mean of its divisors is an integer number (621707801812).

Almost surely, 2^{1243415603623} is an apocalyptic number.

1243415603623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243415603623 is an equidigital number, since it uses as much as digits as its factorization.

1243415603623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 1243415603623 in words is "one trillion, two hundred forty-three billion, four hundred fifteen million, six hundred three thousand, six hundred twenty-three".