13890803491 has 4 divisors (see below), whose sum is σ = 13898089512. Its totient is φ = 13883517472.

The previous prime is 13890803489. The next prime is 13890803497. The reversal of 13890803491 is 19430809831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19430809831 = 41 ⋅473922191.

It is a cyclic number.

It is not a de Polignac number, because 13890803491 - 2¹ = 13890803489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13890803497) 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, 3640150 + ... + 3643963.

It is an arithmetic number, because the mean of its divisors is an integer number (3474522378).

Almost surely, 2^13890803491 is an apocalyptic number.

13890803491 is a deficient number, since it is larger than the sum of its proper divisors (7286021).

13890803491 is an equidigital number, since it uses as much as digits as its factorization.

13890803491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7286020.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 13890803491 in words is "thirteen billion, eight hundred ninety million, eight hundred three thousand, four hundred ninety-one".