11977489 has 4 divisors (see below), whose sum is σ = 12096180. Its totient is φ = 11858800.

The previous prime is 11977451. The next prime is 11977519. The reversal of 11977489 is 98477911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98477911 = 7 ⋅14068273.

It can be written as a sum of positive squares in 2 ways, for example, as 4875264 + 7102225 = 2208^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 11977489 - 2¹¹ = 11975441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11974489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59194 + ... + 59395.

It is an arithmetic number, because the mean of its divisors is an integer number (3024045).

Almost surely, 2^11977489 is an apocalyptic number.

It is an amenable number.

11977489 is a deficient number, since it is larger than the sum of its proper divisors (118691).

11977489 is a wasteful number, since it uses less digits than its factorization.

11977489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118690.

The product of its digits is 127008, while the sum is 46.

The square root of 11977489 is about 3460.8509069303. The cubic root of 11977489 is about 228.7995996639.

It can be divided in two parts, 11977 and 489, that multiplied together give a triangular number (5856753 = T₃₄₂₂).

The spelling of 11977489 in words is "eleven million, nine hundred seventy-seven thousand, four hundred eighty-nine".