11998671 has 16 divisors (see below), whose sum is σ = 16947840. Its totient is φ = 7529760.

The previous prime is 11998661. The next prime is 11998673. The reversal of 11998671 is 17689911.

11998671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11998671 - 2⁶ = 11998607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998673) 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, 9736 + ... + 10898.

It is an arithmetic number, because the mean of its divisors is an integer number (1059240).

Almost surely, 2^11998671 is an apocalyptic number.

11998671 is a deficient number, since it is larger than the sum of its proper divisors (4949169).

11998671 is a wasteful number, since it uses less digits than its factorization.

11998671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its digits is 27216, while the sum is 42.

The square root of 11998671 is about 3463.9097851994. The cubic root of 11998671 is about 228.9343963918.

It can be divided in two parts, 1199 and 8671, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 11998671 in words is "eleven million, nine hundred ninety-eight thousand, six hundred seventy-one".