11616621 has 4 divisors (see below), whose sum is σ = 15488832. Its totient is φ = 7744412.

The previous prime is 11616613. The next prime is 11616637. The reversal of 11616621 is 12661611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12661611 = 3 ⋅4220537.

It is a cyclic number.

It is not a de Polignac number, because 11616621 - 2³ = 11616613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11616591 and 11616600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11616601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936101 + ... + 1936106.

It is an arithmetic number, because the mean of its divisors is an integer number (3872208).

Almost surely, 2^11616621 is an apocalyptic number.

It is an amenable number.

11616621 is a deficient number, since it is larger than the sum of its proper divisors (3872211).

11616621 is an equidigital number, since it uses as much as digits as its factorization.

11616621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872210.

The product of its digits is 432, while the sum is 24.

The square root of 11616621 is about 3408.3164465759. The cubic root of 11616621 is about 226.4783054038.

The spelling of 11616621 in words is "eleven million, six hundred sixteen thousand, six hundred twenty-one".