11648861 has 4 divisors (see below), whose sum is σ = 13312992. Its totient is φ = 9984732.

The previous prime is 11648789. The next prime is 11648869. The reversal of 11648861 is 16884611.

It is a happy number.

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: 16884611 = 1289 ⋅13099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11648861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11648869) 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, 832055 + ... + 832068.

It is an arithmetic number, because the mean of its divisors is an integer number (3328248).

Almost surely, 2^11648861 is an apocalyptic number.

It is an amenable number.

11648861 is a deficient number, since it is larger than the sum of its proper divisors (1664131).

11648861 is an equidigital number, since it uses as much as digits as its factorization.

11648861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664130.

The product of its digits is 9216, while the sum is 35.

The square root of 11648861 is about 3413.0427773469. The cubic root of 11648861 is about 226.6876295011.

The spelling of 11648861 in words is "eleven million, six hundred forty-eight thousand, eight hundred sixty-one".