140632643 has 2 divisors, whose sum is σ = 140632644. Its totient is φ = 140632642.

The previous prime is 140632589. The next prime is 140632673. The reversal of 140632643 is 346236041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140632643 - 2¹⁰ = 140631619 is a prime.

It is not a weakly prime, because it can be changed into another prime (140632673) 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, 70316321 + 70316322.

It is an arithmetic number, because the mean of its divisors is an integer number (70316322).

Almost surely, 2^140632643 is an apocalyptic number.

140632643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140632643 is an equidigital number, since it uses as much as digits as its factorization.

140632643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 140632643 is about 11858.8634784283. The cubic root of 140632643 is about 520.0303766771.

Adding to 140632643 its reverse (346236041), we get a palindrome (486868684).

The spelling of 140632643 in words is "one hundred forty million, six hundred thirty-two thousand, six hundred forty-three".