140681606 has 32 divisors (see below), whose sum is σ = 232636320. Its totient is φ = 63408384.

The previous prime is 140681603. The next prime is 140681609. The reversal of 140681606 is 606186041.

It is a happy number.

140681606 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140681603) and next prime (140681609).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140681603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449306 + ... + 449618.

It is an arithmetic number, because the mean of its divisors is an integer number (7269885).

Almost surely, 2^140681606 is an apocalyptic number.

140681606 is a deficient number, since it is larger than the sum of its proper divisors (91954714).

140681606 is a wasteful number, since it uses less digits than its factorization.

140681606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 140681606 is about 11860.9277040205. The cubic root of 140681606 is about 520.0907213509.

The spelling of 140681606 in words is "one hundred forty million, six hundred eighty-one thousand, six hundred six".