140555747 has 4 divisors (see below), whose sum is σ = 140633136. Its totient is φ = 140478360.

The previous prime is 140555743. The next prime is 140555761. The reversal of 140555747 is 747555041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747555041 = 97 ⋅7706753.

It is a cyclic number.

It is not a de Polignac number, because 140555747 - 2² = 140555743 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 140555747.

It is not an unprimeable number, because it can be changed into a prime (140555743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35903 + ... + 39624.

It is an arithmetic number, because the mean of its divisors is an integer number (35158284).

Almost surely, 2^140555747 is an apocalyptic number.

140555747 is a deficient number, since it is larger than the sum of its proper divisors (77389).

140555747 is an equidigital number, since it uses as much as digits as its factorization.

140555747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77388.

The product of its (nonzero) digits is 98000, while the sum is 38.

The square root of 140555747 is about 11855.6209031834. The cubic root of 140555747 is about 519.9355775713.

The spelling of 140555747 in words is "one hundred forty million, five hundred fifty-five thousand, seven hundred forty-seven".