11816998 has 4 divisors (see below), whose sum is σ = 17725500. Its totient is φ = 5908498.

The previous prime is 11816977. The next prime is 11816999. The reversal of 11816998 is 89961811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89961811 = 101 ⋅890711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11816999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2954248 + ... + 2954251.

It is an arithmetic number, because the mean of its divisors is an integer number (4431375).

Almost surely, 2^11816998 is an apocalyptic number.

11816998 is a deficient number, since it is larger than the sum of its proper divisors (5908502).

11816998 is an equidigital number, since it uses as much as digits as its factorization.

11816998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908501.

The product of its digits is 31104, while the sum is 43.

The square root of 11816998 is about 3437.5860716497. The cubic root of 11816998 is about 227.7730762640.

The spelling of 11816998 in words is "eleven million, eight hundred sixteen thousand, nine hundred ninety-eight".