140044013 has 4 divisors (see below), whose sum is σ = 140138208. Its totient is φ = 139949820.

The previous prime is 140043997. The next prime is 140044063. The reversal of 140044013 is 310440041.

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 not a de Polignac number, because 140044013 - 2⁴ = 140043997 is a prime.

It is a super-2 number, since 2×140044013² = 39224651154288338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140043982 and 140044000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140044063) 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, 44831 + ... + 47852.

It is an arithmetic number, because the mean of its divisors is an integer number (35034552).

Almost surely, 2^140044013 is an apocalyptic number.

It is an amenable number.

140044013 is a deficient number, since it is larger than the sum of its proper divisors (94195).

140044013 is an equidigital number, since it uses as much as digits as its factorization.

140044013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94194.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 140044013 is about 11834.0193087556. The cubic root of 140044013 is about 519.3038181132.

Adding to 140044013 its reverse (310440041), we get a palindrome (450484054).

The spelling of 140044013 in words is "one hundred forty million, forty-four thousand, thirteen".