13890247549 has 4 divisors (see below), whose sum is σ = 13891098400. Its totient is φ = 13889396700.

The previous prime is 13890247543. The next prime is 13890247571. The reversal of 13890247549 is 94574209831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94574209831 = 59 ⋅1602952709.

It is a cyclic number.

It is not a de Polignac number, because 13890247549 - 2¹³ = 13890239357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13890247496 and 13890247505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890247543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400449 + ... + 433750.

It is an arithmetic number, because the mean of its divisors is an integer number (3472774600).

Almost surely, 2^13890247549 is an apocalyptic number.

It is an amenable number.

13890247549 is a deficient number, since it is larger than the sum of its proper divisors (850851).

13890247549 is an equidigital number, since it uses as much as digits as its factorization.

13890247549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850850.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 13890247549 in words is "thirteen billion, eight hundred ninety million, two hundred forty-seven thousand, five hundred forty-nine".