140740643 has 2 divisors, whose sum is σ = 140740644. Its totient is φ = 140740642.

The previous prime is 140740601. The next prime is 140740667. The reversal of 140740643 is 346047041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140740643 - 2¹⁰ = 140739619 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140746643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70370321 + 70370322.

It is an arithmetic number, because the mean of its divisors is an integer number (70370322).

Almost surely, 2^140740643 is an apocalyptic number.

140740643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140740643 is an equidigital number, since it uses as much as digits as its factorization.

140740643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 140740643 is about 11863.4161606175. The cubic root of 140740643 is about 520.1634631560.

Adding to 140740643 its reverse (346047041), we get a palindrome (486787684).

The spelling of 140740643 in words is "one hundred forty million, seven hundred forty thousand, six hundred forty-three".