140971643 has 2 divisors, whose sum is σ = 140971644. Its totient is φ = 140971642.

The previous prime is 140971631. The next prime is 140971657. The reversal of 140971643 is 346179041.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140971643 is a prime.

It is not a weakly prime, because it can be changed into another prime (140971603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70485821 + 70485822.

It is an arithmetic number, because the mean of its divisors is an integer number (70485822).

Almost surely, 2^140971643 is an apocalyptic number.

140971643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140971643 is an equidigital number, since it uses as much as digits as its factorization.

140971643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 140971643 is about 11873.1479818960. The cubic root of 140971643 is about 520.4478919661.

The spelling of 140971643 in words is "one hundred forty million, nine hundred seventy-one thousand, six hundred forty-three".