11231309 has 4 divisors (see below), whose sum is σ = 11303004. Its totient is φ = 11159616.

The previous prime is 11231293. The next prime is 11231317. The reversal of 11231309 is 90313211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90313211 = 4871 ⋅18541.

It can be written as a sum of positive squares in 2 ways, for example, as 3822025 + 7409284 = 1955^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231309 - 2⁴ = 11231293 is a prime.

It is a super-2 number, since 2×11231309² = 252284603706962, which contains 22 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 (11231329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35612 + ... + 35925.

It is an arithmetic number, because the mean of its divisors is an integer number (2825751).

Almost surely, 2^11231309 is an apocalyptic number.

It is an amenable number.

11231309 is a deficient number, since it is larger than the sum of its proper divisors (71695).

11231309 is an equidigital number, since it uses as much as digits as its factorization.

11231309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71694.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 11231309 is about 3351.3145182152. The cubic root of 11231309 is about 223.9460767842.

The spelling of 11231309 in words is "eleven million, two hundred thirty-one thousand, three hundred nine".