140509173 has 16 divisors (see below), whose sum is σ = 219332736. Its totient is φ = 78332160.

The previous prime is 140509157. The next prime is 140509177. The reversal of 140509173 is 371905041.

It is not a de Polignac number, because 140509173 - 2⁴ = 140509157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140509173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140509177) 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, 80736 + ... + 82457.

It is an arithmetic number, because the mean of its divisors is an integer number (13708296).

Almost surely, 2^140509173 is an apocalyptic number.

It is an amenable number.

140509173 is a deficient number, since it is larger than the sum of its proper divisors (78823563).

140509173 is a wasteful number, since it uses less digits than its factorization.

140509173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163244.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 140509173 is about 11853.6565244654. The cubic root of 140509173 is about 519.8781432905.

The spelling of 140509173 in words is "one hundred forty million, five hundred nine thousand, one hundred seventy-three".