11711897 has 4 divisors (see below), whose sum is σ = 11741796. Its totient is φ = 11682000.

The previous prime is 11711879. The next prime is 11711951. The reversal of 11711897 is 79811711.

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 6255001 + 5456896 = 2501^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 11711897 - 2¹⁴ = 11695513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11711797) 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 3 ways as a sum of consecutive naturals, for example, 14354 + ... + 15147.

It is an arithmetic number, because the mean of its divisors is an integer number (2935449).

Almost surely, 2^11711897 is an apocalyptic number.

It is an amenable number.

11711897 is a deficient number, since it is larger than the sum of its proper divisors (29899).

11711897 is an equidigital number, since it uses as much as digits as its factorization.

11711897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29898.

The product of its digits is 3528, while the sum is 35.

The square root of 11711897 is about 3422.2648933126. The cubic root of 11711897 is about 227.0957891063.

The spelling of 11711897 in words is "eleven million, seven hundred eleven thousand, eight hundred ninety-seven".