140636543 has 4 divisors (see below), whose sum is σ = 140668248. Its totient is φ = 140604840.

The previous prime is 140636521. The next prime is 140636557. The reversal of 140636543 is 345636041.

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 140636543 - 2²² = 136442239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140636843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853 + ... + 18518.

It is an arithmetic number, because the mean of its divisors is an integer number (35167062).

Almost surely, 2^140636543 is an apocalyptic number.

140636543 is a deficient number, since it is larger than the sum of its proper divisors (31705).

140636543 is an equidigital number, since it uses as much as digits as its factorization.

140636543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31704.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 140636543 is about 11859.0279112582. The cubic root of 140636543 is about 520.0351837634.

The spelling of 140636543 in words is "one hundred forty million, six hundred thirty-six thousand, five hundred forty-three".