11993489 has 4 divisors (see below), whose sum is σ = 12005556. Its totient is φ = 11981424.

The previous prime is 11993479. The next prime is 11993491. The reversal of 11993489 is 98439911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9985600 + 2007889 = 3160^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 11993489 - 2⁴ = 11993473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11993459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (3001389).

Almost surely, 2^11993489 is an apocalyptic number.

It is an amenable number.

11993489 is a deficient number, since it is larger than the sum of its proper divisors (12067).

11993489 is a wasteful number, since it uses less digits than its factorization.

11993489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066.

The product of its digits is 69984, while the sum is 44.

The square root of 11993489 is about 3463.1617057250. The cubic root of 11993489 is about 228.9014341616.

The spelling of 11993489 in words is "eleven million, nine hundred ninety-three thousand, four hundred eighty-nine".