13531690 has 24 divisors (see below), whose sum is σ = 25241580. Its totient is φ = 5222784.

The previous prime is 13531669. The next prime is 13531703. The reversal of 13531690 is 9613531.

It can be written as a sum of positive squares in 6 ways, for example, as 10259209 + 3272481 = 3203^2 + 1809^2 .

It is a super-2 number, since 2×13531690² = 366213268512200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7606 + ... + 9214.

Almost surely, 2^13531690 is an apocalyptic number.

13531690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13531690 is a deficient number, since it is larger than the sum of its proper divisors (11709890).

13531690 is a wasteful number, since it uses less digits than its factorization.

13531690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 13531690 is about 3678.5445491390. The cubic root of 13531690 is about 238.2963260496.

The spelling of 13531690 in words is "thirteen million, five hundred thirty-one thousand, six hundred ninety".