1023523643 has 2 divisors, whose sum is σ = 1023523644. Its totient is φ = 1023523642.

The previous prime is 1023523639. The next prime is 1023523649. The reversal of 1023523643 is 3463253201.

It is a weak prime.

It is an emirp because it is prime and its reverse (3463253201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023523643 - 2² = 1023523639 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023523649) 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, 511761821 + 511761822.

It is an arithmetic number, because the mean of its divisors is an integer number (511761822).

Almost surely, 2^1023523643 is an apocalyptic number.

1023523643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023523643 is an equidigital number, since it uses as much as digits as its factorization.

1023523643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 1023523643 is about 31992.5560560578. The cubic root of 1023523643 is about 1007.7805208271.

Adding to 1023523643 its reverse (3463253201), we get a palindrome (4486776844).

The spelling of 1023523643 in words is "one billion, twenty-three million, five hundred twenty-three thousand, six hundred forty-three".