11389989 has 16 divisors (see below), whose sum is σ = 16884224. Its totient is φ = 6782400.

The previous prime is 11389979. The next prime is 11389997. The reversal of 11389989 is 98998311.

11389989 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11389989 - 2⁵ = 11389957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11389919) 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, 3502 + ... + 5919.

It is an arithmetic number, because the mean of its divisors is an integer number (1055264).

Almost surely, 2^11389989 is an apocalyptic number.

It is an amenable number.

11389989 is a deficient number, since it is larger than the sum of its proper divisors (5494235).

11389989 is a wasteful number, since it uses less digits than its factorization.

11389989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468.

The product of its digits is 139968, while the sum is 48.

The square root of 11389989 is about 3374.9057764625. The cubic root of 11389989 is about 224.9958122677.

The spelling of 11389989 in words is "eleven million, three hundred eighty-nine thousand, nine hundred eighty-nine".