11718789 has 4 divisors (see below), whose sum is σ = 15625056. Its totient is φ = 7812524.

The previous prime is 11718787. The next prime is 11718809. The reversal of 11718789 is 98781711.

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.

It is a cyclic number.

It is not a de Polignac number, because 11718789 - 2¹ = 11718787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11718789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11718787) 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, 1953129 + ... + 1953134.

It is an arithmetic number, because the mean of its divisors is an integer number (3906264).

Almost surely, 2^11718789 is an apocalyptic number.

It is an amenable number.

11718789 is a deficient number, since it is larger than the sum of its proper divisors (3906267).

11718789 is an equidigital number, since it uses as much as digits as its factorization.

11718789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906266.

The product of its digits is 28224, while the sum is 42.

The square root of 11718789 is about 3423.2716807171. The cubic root of 11718789 is about 227.1403260778.

The spelling of 11718789 in words is "eleven million, seven hundred eighteen thousand, seven hundred eighty-nine".