11781679 has 8 divisors (see below), whose sum is σ = 14500640. Its totient is φ = 9321696.

The previous prime is 11781673. The next prime is 11781703. The reversal of 11781679 is 97618711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11781679 - 2⁵ = 11781647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11781673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64644 + ... + 64825.

It is an arithmetic number, because the mean of its divisors is an integer number (1812580).

Almost surely, 2^11781679 is an apocalyptic number.

11781679 is a deficient number, since it is larger than the sum of its proper divisors (2718961).

11781679 is a wasteful number, since it uses less digits than its factorization.

11781679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129489.

The product of its digits is 21168, while the sum is 40.

The square root of 11781679 is about 3432.4450469017. The cubic root of 11781679 is about 227.5459247946.

It can be divided in two parts, 117 and 81679, that added together give a square (81796 = 286²).

The spelling of 11781679 in words is "eleven million, seven hundred eighty-one thousand, six hundred seventy-nine".