11997607 has 4 divisors (see below), whose sum is σ = 12629080. Its totient is φ = 11366136.

The previous prime is 11997599. The next prime is 11997611. The reversal of 11997607 is 70679911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70679911 = 167 ⋅423233.

It is a cyclic number.

It is not a de Polignac number, because 11997607 - 2³ = 11997599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11997607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11997617) 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, 315708 + ... + 315745.

It is an arithmetic number, because the mean of its divisors is an integer number (3157270).

Almost surely, 2^11997607 is an apocalyptic number.

11997607 is a deficient number, since it is larger than the sum of its proper divisors (631473).

11997607 is an equidigital number, since it uses as much as digits as its factorization.

11997607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631472.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 11997607 is about 3463.7561981179. The cubic root of 11997607 is about 228.9276291591.

The spelling of 11997607 in words is "eleven million, nine hundred ninety-seven thousand, six hundred seven".