13940753809 has 4 divisors (see below), whose sum is σ = 13942427940. Its totient is φ = 13939079680.

The previous prime is 13940753807. The next prime is 13940753857. The reversal of 13940753809 is 90835704931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90835704931 = 47 ⋅1932674573.

It can be written as a sum of positive squares in 2 ways, for example, as 11008206400 + 2932547409 = 104920^2 + 54153^2 .

It is a cyclic number.

It is not a de Polignac number, because 13940753809 - 2¹ = 13940753807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13940753807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824512 + ... + 841249.

It is an arithmetic number, because the mean of its divisors is an integer number (3485606985).

Almost surely, 2^13940753809 is an apocalyptic number.

It is an amenable number.

13940753809 is a deficient number, since it is larger than the sum of its proper divisors (1674131).

13940753809 is an equidigital number, since it uses as much as digits as its factorization.

13940753809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674130.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 13940753809 in words is "thirteen billion, nine hundred forty million, seven hundred fifty-three thousand, eight hundred nine".