11311897 has 4 divisors (see below), whose sum is σ = 11907280. Its totient is φ = 10716516.

The previous prime is 11311891. The next prime is 11311903. The reversal of 11311897 is 79811311.

11311897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is an interprime number because it is at equal distance from previous prime (11311891) and next prime (11311903).

It is a cyclic number.

It is not a de Polignac number, because 11311897 - 2³ = 11311889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311891) 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, 297663 + ... + 297700.

It is an arithmetic number, because the mean of its divisors is an integer number (2976820).

Almost surely, 2^11311897 is an apocalyptic number.

It is an amenable number.

11311897 is a deficient number, since it is larger than the sum of its proper divisors (595383).

11311897 is an equidigital number, since it uses as much as digits as its factorization.

11311897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595382.

The product of its digits is 1512, while the sum is 31.

The square root of 11311897 is about 3363.3163692998. The cubic root of 11311897 is about 224.4804274582.

The spelling of 11311897 in words is "eleven million, three hundred eleven thousand, eight hundred ninety-seven".