11172789 has 8 divisors (see below), whose sum is σ = 16552320. Its totient is φ = 7448508.

The previous prime is 11172781. The next prime is 11172797. The reversal of 11172789 is 98727111.

It is an interprime number because it is at equal distance from previous prime (11172781) and next prime (11172797).

It is not a de Polignac number, because 11172789 - 2³ = 11172781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206877 + ... + 206930.

It is an arithmetic number, because the mean of its divisors is an integer number (2069040).

Almost surely, 2^11172789 is an apocalyptic number.

It is an amenable number.

11172789 is a deficient number, since it is larger than the sum of its proper divisors (5379531).

11172789 is an equidigital number, since it uses as much as digits as its factorization.

11172789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413816 (or 413810 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 11172789 is about 3342.5722131317. The cubic root of 11172789 is about 223.5564471632.

It can be divided in two parts, 111 and 72789, that added together give a square (72900 = 270²).

The spelling of 11172789 in words is "eleven million, one hundred seventy-two thousand, seven hundred eighty-nine".