140711909 has 4 divisors (see below), whose sum is σ = 151535916. Its totient is φ = 129887904.

The previous prime is 140711903. The next prime is 140711927. The reversal of 140711909 is 909117041.

It is a happy number.

140711909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 85507009 + 55204900 = 9247^2 + 7430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140711909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140711903) 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, 5411984 + ... + 5412009.

It is an arithmetic number, because the mean of its divisors is an integer number (37883979).

Almost surely, 2^140711909 is an apocalyptic number.

It is an amenable number.

140711909 is a deficient number, since it is larger than the sum of its proper divisors (10824007).

140711909 is a wasteful number, since it uses less digits than its factorization.

140711909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824006.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 140711909 is about 11862.2050648267. The cubic root of 140711909 is about 520.1280614082.

The spelling of 140711909 in words is "one hundred forty million, seven hundred eleven thousand, nine hundred nine".