140001643 has 2 divisors, whose sum is σ = 140001644. Its totient is φ = 140001642.

The previous prime is 140001607. The next prime is 140001677. The reversal of 140001643 is 346100041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140001643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140001643.

It is not a weakly prime, because it can be changed into another prime (140001683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70000821 + 70000822.

It is an arithmetic number, because the mean of its divisors is an integer number (70000822).

Almost surely, 2^140001643 is an apocalyptic number.

140001643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140001643 is an equidigital number, since it uses as much as digits as its factorization.

140001643 is an odious number, because the sum of its binary digits is odd.

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

The square root of 140001643 is about 11832.2289954176. The cubic root of 140001643 is about 519.2514414314.

Adding to 140001643 its reverse (346100041), we get a palindrome (486101684).

The spelling of 140001643 in words is "one hundred forty million, one thousand, six hundred forty-three".