11898709 has 4 divisors (see below), whose sum is σ = 12016620. Its totient is φ = 11780800.

The previous prime is 11898701. The next prime is 11898713. The reversal of 11898709 is 90789811.

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 11242609 + 656100 = 3353^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 11898709 - 2³ = 11898701 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 (11898701) 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, 58804 + ... + 59005.

It is an arithmetic number, because the mean of its divisors is an integer number (3004155).

Almost surely, 2^11898709 is an apocalyptic number.

It is an amenable number.

11898709 is a deficient number, since it is larger than the sum of its proper divisors (117911).

11898709 is a wasteful number, since it uses less digits than its factorization.

11898709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117910.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 11898709 is about 3449.4505359550. The cubic root of 11898709 is about 228.2968650207.

The spelling of 11898709 in words is "eleven million, eight hundred ninety-eight thousand, seven hundred nine".