13890529 has 3 divisors (see below), whose sum is σ = 13894257. Its totient is φ = 13886802.

The previous prime is 13890509. The next prime is 13890553. The reversal of 13890529 is 92509831.

The square root of 13890529 is 3727.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 13890529 - 2¹⁵ = 13857761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13890509) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1864 + ... + 5590.

It is an arithmetic number, because the mean of its divisors is an integer number (4631419).

Almost surely, 2^13890529 is an apocalyptic number.

13890529 is the 3727-th square number.

13890529 is the 1864-th centered octagonal number.

It is an amenable number.

13890529 is a deficient number, since it is larger than the sum of its proper divisors (3728).

13890529 is an frugal number, since it uses more digits than its factorization.

13890529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454 (or 3727 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The cubic root of 13890529 is about 240.3843898103.

The spelling of 13890529 in words is "thirteen million, eight hundred ninety thousand, five hundred twenty-nine".