11658989 has 8 divisors (see below), whose sum is σ = 12347040. Its totient is φ = 10978416.

The previous prime is 11658979. The next prime is 11659003. The reversal of 11658989 is 98985611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11658989 - 2¹⁶ = 11593453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11658919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514 + ... + 5060.

It is an arithmetic number, because the mean of its divisors is an integer number (1543380).

Almost surely, 2^11658989 is an apocalyptic number.

11658989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11658989 is a deficient number, since it is larger than the sum of its proper divisors (688051).

11658989 is a wasteful number, since it uses less digits than its factorization.

11658989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739.

The product of its digits is 155520, while the sum is 47.

The square root of 11658989 is about 3414.5261750351. The cubic root of 11658989 is about 226.7533076605.

The spelling of 11658989 in words is "eleven million, six hundred fifty-eight thousand, nine hundred eighty-nine".