11896309 has 4 divisors (see below), whose sum is σ = 11976300. Its totient is φ = 11816320.

The previous prime is 11896303. The next prime is 11896331. The reversal of 11896309 is 90369811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90369811 = 7 ⋅12909973.

It can be written as a sum of positive squares in 2 ways, for example, as 4622500 + 7273809 = 2150^2 + 2697^2 .

It is a cyclic number.

It is not a de Polignac number, because 11896309 - 2¹⁵ = 11863541 is a prime.

It is a super-3 number, since 3×11896309³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11896303) 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, 39772 + ... + 40069.

It is an arithmetic number, because the mean of its divisors is an integer number (2994075).

Almost surely, 2^11896309 is an apocalyptic number.

It is an amenable number.

11896309 is a deficient number, since it is larger than the sum of its proper divisors (79991).

11896309 is an equidigital number, since it uses as much as digits as its factorization.

11896309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79990.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 11896309 is about 3449.1026369188. The cubic root of 11896309 is about 228.2815146350.

The spelling of 11896309 in words is "eleven million, eight hundred ninety-six thousand, three hundred nine".