11683521 has 10 divisors (see below), whose sum is σ = 17453282. Its totient is φ = 7788960.

The previous prime is 11683501. The next prime is 11683523. The reversal of 11683521 is 12538611.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 1185921 = 3240^2 + 1089^2 .

It is not a de Polignac number, because 11683521 - 2⁶ = 11683457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11683523) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 72040 + ... + 72201.

Almost surely, 2^11683521 is an apocalyptic number.

It is an amenable number.

11683521 is a deficient number, since it is larger than the sum of its proper divisors (5769761).

11683521 is an equidigital number, since it uses as much as digits as its factorization.

11683521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144253 (or 144244 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11683521 is about 3418.1165866600. The cubic root of 11683521 is about 226.9122355386.

The spelling of 11683521 in words is "eleven million, six hundred eighty-three thousand, five hundred twenty-one".