11978659 has 16 divisors (see below), whose sum is σ = 15814656. Its totient is φ = 8784000.

The previous prime is 11978657. The next prime is 11978663. The reversal of 11978659 is 95687911.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11978659 - 2¹ = 11978657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11978651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3267 + ... + 5884.

It is an arithmetic number, because the mean of its divisors is an integer number (988416).

Almost surely, 2^11978659 is an apocalyptic number.

11978659 is a deficient number, since it is larger than the sum of its proper divisors (3835997).

11978659 is a wasteful number, since it uses less digits than its factorization.

11978659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9186.

The product of its digits is 136080, while the sum is 46.

The square root of 11978659 is about 3461.0199363771. The cubic root of 11978659 is about 228.8070493838.

The spelling of 11978659 in words is "eleven million, nine hundred seventy-eight thousand, six hundred fifty-nine".