11497309 has 4 divisors (see below), whose sum is σ = 11997216. Its totient is φ = 10997404.

The previous prime is 11497307. The next prime is 11497327. The reversal of 11497309 is 90379411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90379411 = 89 ⋅1015499.

It is not a de Polignac number, because 11497309 - 2¹ = 11497307 is a prime.

It is a super-2 number, since 2×11497309² = 264376228482962, 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 (11497307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249919 + ... + 249964.

It is an arithmetic number, because the mean of its divisors is an integer number (2999304).

Almost surely, 2^11497309 is an apocalyptic number.

It is an amenable number.

11497309 is a deficient number, since it is larger than the sum of its proper divisors (499907).

11497309 is an equidigital number, since it uses as much as digits as its factorization.

11497309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499906.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 11497309 is about 3390.7682020451. The cubic root of 11497309 is about 225.7002644063.

The spelling of 11497309 in words is "eleven million, four hundred ninety-seven thousand, three hundred nine".