1023111643 has 2 divisors, whose sum is σ = 1023111644. Its totient is φ = 1023111642.

The previous prime is 1023111613. The next prime is 1023111647. The reversal of 1023111643 is 3461113201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023111643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023111647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511555821 + 511555822.

It is an arithmetic number, because the mean of its divisors is an integer number (511555822).

Almost surely, 2^1023111643 is an apocalyptic number.

1023111643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023111643 is an equidigital number, since it uses as much as digits as its factorization.

1023111643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1023111643 is about 31986.1164100927. The cubic root of 1023111643 is about 1007.6452817111.

Adding to 1023111643 its reverse (3461113201), we get a palindrome (4484224844).

The spelling of 1023111643 in words is "one billion, twenty-three million, one hundred eleven thousand, six hundred forty-three".