11993651 has 4 divisors (see below), whose sum is σ = 12012672. Its totient is φ = 11974632.

The previous prime is 11993593. The next prime is 11993659. The reversal of 11993651 is 15639911.

11993651 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11993651 - 2¹⁰ = 11992627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11993659) 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, 8531 + ... + 9836.

It is an arithmetic number, because the mean of its divisors is an integer number (3003168).

Almost surely, 2^11993651 is an apocalyptic number.

11993651 is a deficient number, since it is larger than the sum of its proper divisors (19021).

11993651 is an equidigital number, since it uses as much as digits as its factorization.

11993651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19020.

The product of its digits is 7290, while the sum is 35.

The square root of 11993651 is about 3463.1850946780. The cubic root of 11993651 is about 228.9024647726.

The spelling of 11993651 in words is "eleven million, nine hundred ninety-three thousand, six hundred fifty-one".