140781983 has 4 divisors (see below), whose sum is σ = 140921160. Its totient is φ = 140642808.

The previous prime is 140781973. The next prime is 140781989. The reversal of 140781983 is 389187041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140781983 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 140781983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140781989) 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, 68060 + ... + 70097.

It is an arithmetic number, because the mean of its divisors is an integer number (35230290).

Almost surely, 2^140781983 is an apocalyptic number.

140781983 is a deficient number, since it is larger than the sum of its proper divisors (139177).

140781983 is a wasteful number, since it uses less digits than its factorization.

140781983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139176.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 140781983 is about 11865.1583638820. The cubic root of 140781983 is about 520.2143876841.

It can be divided in two parts, 14078 and 1983, that added together give a palindrome (16061).

The spelling of 140781983 in words is "one hundred forty million, seven hundred eighty-one thousand, nine hundred eighty-three".