140754209 has 4 divisors (see below), whose sum is σ = 140825280. Its totient is φ = 140683140.

The previous prime is 140754199. The next prime is 140754217. The reversal of 140754209 is 902457041.

It is a happy number.

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-140754209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140754259) 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, 32477 + ... + 36554.

It is an arithmetic number, because the mean of its divisors is an integer number (35206320).

Almost surely, 2^140754209 is an apocalyptic number.

It is an amenable number.

140754209 is a deficient number, since it is larger than the sum of its proper divisors (71071).

140754209 is an equidigital number, since it uses as much as digits as its factorization.

140754209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71070.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 140754209 is about 11863.9879045791. The cubic root of 140754209 is about 520.1801754827.

The spelling of 140754209 in words is "one hundred forty million, seven hundred fifty-four thousand, two hundred nine".