11511897 has 8 divisors (see below), whose sum is σ = 15385920. Its totient is φ = 7656240.

The previous prime is 11511893. The next prime is 11511901. The reversal of 11511897 is 79811511.

It is an interprime number because it is at equal distance from previous prime (11511893) and next prime (11511901).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11511897 - 2² = 11511893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11511893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3054 + ... + 5687.

It is an arithmetic number, because the mean of its divisors is an integer number (1923240).

Almost surely, 2^11511897 is an apocalyptic number.

It is an amenable number.

11511897 is a deficient number, since it is larger than the sum of its proper divisors (3874023).

11511897 is an equidigital number, since it uses as much as digits as its factorization.

11511897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183.

The product of its digits is 2520, while the sum is 33.

The square root of 11511897 is about 3392.9186550815. The cubic root of 11511897 is about 225.7956816296.

The spelling of 11511897 in words is "eleven million, five hundred eleven thousand, eight hundred ninety-seven".