140540191 has 4 divisors (see below), whose sum is σ = 153316584. Its totient is φ = 127763800.

The previous prime is 140540161. The next prime is 140540203. The reversal of 140540191 is 191045041.

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

It is a cyclic number.

It is not a de Polignac number, because 140540191 - 2⁵ = 140540159 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 (140540161) 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 3 ways as a sum of consecutive naturals, for example, 6388180 + ... + 6388201.

It is an arithmetic number, because the mean of its divisors is an integer number (38329146).

Almost surely, 2^140540191 is an apocalyptic number.

140540191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140540191 is a deficient number, since it is larger than the sum of its proper divisors (12776393).

140540191 is a wasteful number, since it uses less digits than its factorization.

140540191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776392.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 140540191 is about 11854.9648249162. The cubic root of 140540191 is about 519.9163955827.

The spelling of 140540191 in words is "one hundred forty million, five hundred forty thousand, one hundred ninety-one".