140991606 has 48 divisors (see below), whose sum is σ = 349783200. Its totient is φ = 40207104.

The previous prime is 140991601. The next prime is 140991611. The reversal of 140991606 is 606199041.

140991606 is a `hidden beast` number, since 1 + 40 + 9 + 9 + 1 + 606 = 666.

It is an interprime number because it is at equal distance from previous prime (140991601) and next prime (140991611).

It is a Smith number, since the sum of its digits (36) 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 (140991601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126580 + ... + 127688.

It is an arithmetic number, because the mean of its divisors is an integer number (7287150).

Almost surely, 2^140991606 is an apocalyptic number.

140991606 is an abundant number, since it is smaller than the sum of its proper divisors (208791594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140991606 is a wasteful number, since it uses less digits than its factorization.

140991606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 140991606 is about 11873.9886306161. The cubic root of 140991606 is about 520.4724576888.

The spelling of 140991606 in words is "one hundred forty million, nine hundred ninety-one thousand, six hundred six".