140171893 has 4 divisors (see below), whose sum is σ = 140305068. Its totient is φ = 140038720.

The previous prime is 140171891. The next prime is 140171917. The reversal of 140171893 is 398171041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58033924 + 82137969 = 7618^2 + 9063^2 .

It is a cyclic number.

It is not a de Polignac number, because 140171893 - 2¹ = 140171891 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 (140171891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64996 + ... + 67117.

It is an arithmetic number, because the mean of its divisors is an integer number (35076267).

Almost surely, 2^140171893 is an apocalyptic number.

It is an amenable number.

140171893 is a deficient number, since it is larger than the sum of its proper divisors (133175).

140171893 is a wasteful number, since it uses less digits than its factorization.

140171893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133174.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 140171893 is about 11839.4211429444. The cubic root of 140171893 is about 519.4618359811.

The spelling of 140171893 in words is "one hundred forty million, one hundred seventy-one thousand, eight hundred ninety-three".