13890261727 has 4 divisors (see below), whose sum is σ = 13944309696. Its totient is φ = 13836213760.

The previous prime is 13890261659. The next prime is 13890261739. The reversal of 13890261727 is 72716209831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72716209831 = 224579 ⋅323789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13890261727 is a prime.

It is a super-2 number, since 2×13890261727² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890261787) 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, 27023599 + ... + 27024112.

It is an arithmetic number, because the mean of its divisors is an integer number (3486077424).

Almost surely, 2^13890261727 is an apocalyptic number.

13890261727 is a deficient number, since it is larger than the sum of its proper divisors (54047969).

13890261727 is an equidigital number, since it uses as much as digits as its factorization.

13890261727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54047968.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 13890261727 in words is "thirteen billion, eight hundred ninety million, two hundred sixty-one thousand, seven hundred twenty-seven".