140687663 has 4 divisors (see below), whose sum is σ = 140716920. Its totient is φ = 140658408.

The previous prime is 140687639. The next prime is 140687713. The reversal of 140687663 is 366786041.

140687663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366786041 = 41 ⋅8946001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140687663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140687663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140687633) 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, 5528 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (35179230).

Almost surely, 2^140687663 is an apocalyptic number.

140687663 is a deficient number, since it is larger than the sum of its proper divisors (29257).

140687663 is an equidigital number, since it uses as much as digits as its factorization.

140687663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29256.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 140687663 is about 11861.1830354312. The cubic root of 140687663 is about 520.0981853551.

The spelling of 140687663 in words is "one hundred forty million, six hundred eighty-seven thousand, six hundred sixty-three".