13890535 has 4 divisors (see below), whose sum is σ = 16668648. Its totient is φ = 11112424.

The previous prime is 13890509. The next prime is 13890553. The reversal of 13890535 is 53509831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53509831 = 1571 ⋅34061.

It is a cyclic number.

It is not a de Polignac number, because 13890535 - 2⁷ = 13890407 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 13890535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389049 + ... + 1389058.

It is an arithmetic number, because the mean of its divisors is an integer number (4167162).

Almost surely, 2^13890535 is an apocalyptic number.

13890535 is a deficient number, since it is larger than the sum of its proper divisors (2778113).

13890535 is an equidigital number, since it uses as much as digits as its factorization.

13890535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778112.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 13890535 is about 3727.0008049369. Note that the first 3 decimals coincide. The cubic root of 13890535 is about 240.3844244216.

The spelling of 13890535 in words is "thirteen million, eight hundred ninety thousand, five hundred thirty-five".