11653543 has 4 divisors (see below), whose sum is σ = 12712968. Its totient is φ = 10594120.

The previous prime is 11653531. The next prime is 11653549. The reversal of 11653543 is 34535611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34535611 = 11 ⋅3139601.

It is a cyclic number.

It is not a de Polignac number, because 11653543 - 2¹³ = 11645351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11653549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 529696 + ... + 529717.

It is an arithmetic number, because the mean of its divisors is an integer number (3178242).

Almost surely, 2^11653543 is an apocalyptic number.

11653543 is a deficient number, since it is larger than the sum of its proper divisors (1059425).

11653543 is a wasteful number, since it uses less digits than its factorization.

11653543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059424.

The product of its digits is 5400, while the sum is 28.

The square root of 11653543 is about 3413.7286066704. The cubic root of 11653543 is about 226.7179961128.

The spelling of 11653543 in words is "eleven million, six hundred fifty-three thousand, five hundred forty-three".