140781389 has 8 divisors (see below), whose sum is σ = 162317760. Its totient is φ = 119601216.

The previous prime is 140781379. The next prime is 140781391. The reversal of 140781389 is 983187041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-140781389 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 (140781349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88199 + ... + 89780.

It is an arithmetic number, because the mean of its divisors is an integer number (20289720).

Almost surely, 2^140781389 is an apocalyptic number.

It is an amenable number.

140781389 is a deficient number, since it is larger than the sum of its proper divisors (21536371).

140781389 is a wasteful number, since it uses less digits than its factorization.

140781389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178099.

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

The square root of 140781389 is about 11865.1333325842. The cubic root of 140781389 is about 520.2136560379.

The spelling of 140781389 in words is "one hundred forty million, seven hundred eighty-one thousand, three hundred eighty-nine".