140605893 has 12 divisors (see below), whose sum is σ = 203220108. Its totient is φ = 93680640.

The previous prime is 140605889. The next prime is 140605921. The reversal of 140605893 is 398506041.

140605893 is a `hidden beast` number, since 1 + 40 + 605 + 8 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98069409 + 42536484 = 9903^2 + 6522^2 .

It is not a de Polignac number, because 140605893 - 2² = 140605889 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140605813) 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 11 ways as a sum of consecutive naturals, for example, 15621 + ... + 22917.

It is an arithmetic number, because the mean of its divisors is an integer number (16935009).

Almost surely, 2^140605893 is an apocalyptic number.

It is an amenable number.

140605893 is a deficient number, since it is larger than the sum of its proper divisors (62614215).

140605893 is a wasteful number, since it uses less digits than its factorization.

140605893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444 (or 9441 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 140605893 is about 11857.7355764075. The cubic root of 140605893 is about 519.9974026004.

The spelling of 140605893 in words is "one hundred forty million, six hundred five thousand, eight hundred ninety-three".