11387709 has 32 divisors (see below), whose sum is σ = 17633280. Its totient is φ = 7348320.

The previous prime is 11387693. The next prime is 11387729. The reversal of 11387709 is 90778311.

It is not a de Polignac number, because 11387709 - 2⁴ = 11387693 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11387729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89604 + ... + 89730.

It is an arithmetic number, because the mean of its divisors is an integer number (551040).

Almost surely, 2^11387709 is an apocalyptic number.

It is an amenable number.

11387709 is a deficient number, since it is larger than the sum of its proper divisors (6245571).

11387709 is an frugal number, since it uses more digits than its factorization.

11387709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 11387709 is about 3374.5679723485. The cubic root of 11387709 is about 224.9807983614.

The spelling of 11387709 in words is "eleven million, three hundred eighty-seven thousand, seven hundred nine".