11720173 has 4 divisors (see below), whose sum is σ = 11918880. Its totient is φ = 11521468.

The previous prime is 11720153. The next prime is 11720197. The reversal of 11720173 is 37102711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37102711 = 157 ⋅236323.

It is a cyclic number.

It is not a de Polignac number, because 11720173 - 2⁹ = 11719661 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 (11720153) 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, 99265 + ... + 99382.

It is an arithmetic number, because the mean of its divisors is an integer number (2979720).

Almost surely, 2^11720173 is an apocalyptic number.

It is an amenable number.

11720173 is a deficient number, since it is larger than the sum of its proper divisors (198707).

11720173 is an equidigital number, since it uses as much as digits as its factorization.

11720173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198706.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 11720173 is about 3423.4738205513. The cubic root of 11720173 is about 227.1492675545.

Adding to 11720173 its reverse (37102711), we get a palindrome (48822884).

The spelling of 11720173 in words is "eleven million, seven hundred twenty thousand, one hundred seventy-three".