140009105 has 4 divisors (see below), whose sum is σ = 168010932. Its totient is φ = 112007280.

The previous prime is 140009101. The next prime is 140009117. The reversal of 140009105 is 501900041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501900041 = 349 ⋅1438109.

It can be written as a sum of positive squares in 2 ways, for example, as 106646929 + 33362176 = 10327^2 + 5776^2 .

It is not a de Polignac number, because 140009105 - 2² = 140009101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140009101) 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, 14000906 + ... + 14000915.

It is an arithmetic number, because the mean of its divisors is an integer number (42002733).

Almost surely, 2^140009105 is an apocalyptic number.

It is an amenable number.

140009105 is a deficient number, since it is larger than the sum of its proper divisors (28001827).

140009105 is an equidigital number, since it uses as much as digits as its factorization.

140009105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28001826.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 140009105 is about 11832.5443164182. The cubic root of 140009105 is about 519.2606665265.

Adding to 140009105 its reverse (501900041), we get a palindrome (641909146).

The spelling of 140009105 in words is "one hundred forty million, nine thousand, one hundred five".