1000140643 has 2 divisors, whose sum is σ = 1000140644. Its totient is φ = 1000140642.

The previous prime is 1000140623. The next prime is 1000140649. The reversal of 1000140643 is 3460410001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000140643 - 2⁵ = 1000140611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000140643.

It is not a weakly prime, because it can be changed into another prime (1000140649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500070321 + 500070322.

It is an arithmetic number, because the mean of its divisors is an integer number (500070322).

Almost surely, 2^1000140643 is an apocalyptic number.

1000140643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000140643 is an equidigital number, since it uses as much as digits as its factorization.

1000140643 is an evil number, because the sum of its binary digits is even.

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

The square root of 1000140643 is about 31625.0002845850. Note that the first 3 decimals coincide. The cubic root of 1000140643 is about 1000.0468788023.

Adding to 1000140643 its reverse (3460410001), we get a palindrome (4460550644).

The spelling of 1000140643 in words is "one billion, one hundred forty thousand, six hundred forty-three".