140075309 has 4 divisors (see below), whose sum is σ = 152809440. Its totient is φ = 127341180.

The previous prime is 140075281. The next prime is 140075339. The reversal of 140075309 is 903570041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140075309 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 (140075339) 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, 6367049 + ... + 6367070.

It is an arithmetic number, because the mean of its divisors is an integer number (38202360).

Almost surely, 2^140075309 is an apocalyptic number.

It is an amenable number.

140075309 is a deficient number, since it is larger than the sum of its proper divisors (12734131).

140075309 is a wasteful number, since it uses less digits than its factorization.

140075309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12734130.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 140075309 is about 11835.3415244343. The cubic root of 140075309 is about 519.3424986239.

The spelling of 140075309 in words is "one hundred forty million, seventy-five thousand, three hundred nine".