140646543 has 4 divisors (see below), whose sum is σ = 187528728. Its totient is φ = 93764360.

The previous prime is 140646497. The next prime is 140646551. The reversal of 140646543 is 345646041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140646543 - 2²¹ = 138549391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140646553) 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 in 3 ways as a sum of consecutive naturals, for example, 23441088 + ... + 23441093.

It is an arithmetic number, because the mean of its divisors is an integer number (46882182).

Almost surely, 2^140646543 is an apocalyptic number.

140646543 is a deficient number, since it is larger than the sum of its proper divisors (46882185).

140646543 is an equidigital number, since it uses as much as digits as its factorization.

140646543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46882184.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 140646543 is about 11859.4495234813. The cubic root of 140646543 is about 520.0475092194.

The spelling of 140646543 in words is "one hundred forty million, six hundred forty-six thousand, five hundred forty-three".