13984531 has 4 divisors (see below), whose sum is σ = 15255864. Its totient is φ = 12713200.

The previous prime is 13984519. The next prime is 13984543. The reversal of 13984531 is 13548931.

13984531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13548931 = 11 ⋅1231721.

It is an interprime number because it is at equal distance from previous prime (13984519) and next prime (13984543).

It is a cyclic number.

It is not a de Polignac number, because 13984531 - 2¹⁷ = 13853459 is a prime.

It is a super-2 number, since 2×13984531² = 391134214579922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13984511) 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, 635650 + ... + 635671.

It is an arithmetic number, because the mean of its divisors is an integer number (3813966).

Almost surely, 2^13984531 is an apocalyptic number.

13984531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13984531 is a deficient number, since it is larger than the sum of its proper divisors (1271333).

13984531 is a wasteful number, since it uses less digits than its factorization.

13984531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271332.

The product of its digits is 12960, while the sum is 34.

The square root of 13984531 is about 3739.5896833744. The cubic root of 13984531 is about 240.9254258684.

Subtracting from 13984531 its reverse (13548931), we obtain a square (435600 = 660²).

It can be divided in two parts, 139845 and 31, that added together give a square (139876 = 374²).

The spelling of 13984531 in words is "thirteen million, nine hundred eighty-four thousand, five hundred thirty-one".