140916109 has 4 divisors (see below), whose sum is σ = 142311420. Its totient is φ = 139520800.

The previous prime is 140916089. The next prime is 140916119. The reversal of 140916109 is 901619041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901619041 = 23623 ⋅38167.

It can be written as a sum of positive squares in 2 ways, for example, as 137992009 + 2924100 = 11747^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 140916109 - 2⁷ = 140915981 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140916119) 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, 697504 + ... + 697705.

It is an arithmetic number, because the mean of its divisors is an integer number (35577855).

Almost surely, 2^140916109 is an apocalyptic number.

It is an amenable number.

140916109 is a deficient number, since it is larger than the sum of its proper divisors (1395311).

140916109 is a wasteful number, since it uses less digits than its factorization.

140916109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395310.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 140916109 is about 11870.8091131144. The cubic root of 140916109 is about 520.3795416967.

The spelling of 140916109 in words is "one hundred forty million, nine hundred sixteen thousand, one hundred nine".