1001945543 has 2 divisors, whose sum is σ = 1001945544. Its totient is φ = 1001945542.

The previous prime is 1001945531. The next prime is 1001945561. The reversal of 1001945543 is 3455491001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001945543 - 2⁶ = 1001945479 is a prime.

It is a super-2 number, since 2×1001945543² = 2007789742275129698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001945843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500972771 + 500972772.

It is an arithmetic number, because the mean of its divisors is an integer number (500972772).

Almost surely, 2^1001945543 is an apocalyptic number.

1001945543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001945543 is an equidigital number, since it uses as much as digits as its factorization.

1001945543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1001945543 is about 31653.5233899798. The cubic root of 1001945543 is about 1000.6480942165.

The spelling of 1001945543 in words is "one billion, one million, nine hundred forty-five thousand, five hundred forty-three".