11617997 has 6 divisors (see below), whose sum is σ = 11724654. Its totient is φ = 11512280.

The previous prime is 11617973. The next prime is 11618003. The reversal of 11617997 is 79971611.

11617997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 17161 = 3406^2 + 131^2 .

It is not a de Polignac number, because 11617997 - 2⁶ = 11617933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11617937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16823 + ... + 17499.

It is an arithmetic number, because the mean of its divisors is an integer number (1954109).

Almost surely, 2^11617997 is an apocalyptic number.

It is an amenable number.

11617997 is a deficient number, since it is larger than the sum of its proper divisors (106657).

11617997 is an frugal number, since it uses more digits than its factorization.

11617997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 808 counting only the distinct ones).

The product of its digits is 23814, while the sum is 41.

The square root of 11617997 is about 3408.5182997895. The cubic root of 11617997 is about 226.4872472422.

The spelling of 11617997 in words is "eleven million, six hundred seventeen thousand, nine hundred ninety-seven".