11117897 has 12 divisors (see below), whose sum is σ = 13000320. Its totient is φ = 9313896.

The previous prime is 11117893. The next prime is 11117903. The reversal of 11117897 is 79871111.

It is not a de Polignac number, because 11117897 - 2² = 11117893 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11117893) 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 11 ways as a sum of consecutive naturals, for example, 15104 + ... + 15822.

It is an arithmetic number, because the mean of its divisors is an integer number (1083360).

Almost surely, 2^11117897 is an apocalyptic number.

It is an amenable number.

11117897 is a deficient number, since it is larger than the sum of its proper divisors (1882423).

11117897 is an frugal number, since it uses more digits than its factorization.

11117897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 773 counting only the distinct ones).

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

The square root of 11117897 is about 3334.3510613011. The cubic root of 11117897 is about 223.1897344255.

The spelling of 11117897 in words is "eleven million, one hundred seventeen thousand, eight hundred ninety-seven".