140931668 has 24 divisors (see below), whose sum is σ = 254743944. Its totient is φ = 68169600.

The previous prime is 140931667. The next prime is 140931689. The reversal of 140931668 is 866139041.

It can be written as a sum of positive squares in 4 ways, for example, as 22165264 + 118766404 = 4708^2 + 10898^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140931667) 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, 24158 + ... + 29418.

It is an arithmetic number, because the mean of its divisors is an integer number (10614331).

Almost surely, 2^140931668 is an apocalyptic number.

It is an amenable number.

140931668 is a deficient number, since it is larger than the sum of its proper divisors (113812276).

140931668 is a wasteful number, since it uses less digits than its factorization.

140931668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483 (or 5481 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 140931668 is about 11871.4644420981. The cubic root of 140931668 is about 520.3986932505.

The spelling of 140931668 in words is "one hundred forty million, nine hundred thirty-one thousand, six hundred sixty-eight".