140611643 has 2 divisors, whose sum is σ = 140611644. Its totient is φ = 140611642.

The previous prime is 140611619. The next prime is 140611657. The reversal of 140611643 is 346116041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140611643 is a prime.

It is not a weakly prime, because it can be changed into another prime (140611613) 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, 70305821 + 70305822.

It is an arithmetic number, because the mean of its divisors is an integer number (70305822).

Almost surely, 2^140611643 is an apocalyptic number.

140611643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140611643 is an equidigital number, since it uses as much as digits as its factorization.

140611643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 140611643 is about 11857.9780316882. The cubic root of 140611643 is about 520.0044908389.

Adding to 140611643 its reverse (346116041), we get a palindrome (486727684).

The spelling of 140611643 in words is "one hundred forty million, six hundred eleven thousand, six hundred forty-three".