11128723 has 4 divisors (see below), whose sum is σ = 11262888. Its totient is φ = 10994560.

The previous prime is 11128709. The next prime is 11128739. The reversal of 11128723 is 32782111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11128723 is a prime.

It is a super-2 number, since 2×11128723² = 247696951221458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11128763) 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, 66958 + ... + 67123.

It is an arithmetic number, because the mean of its divisors is an integer number (2815722).

Almost surely, 2^11128723 is an apocalyptic number.

11128723 is a deficient number, since it is larger than the sum of its proper divisors (134165).

11128723 is an equidigital number, since it uses as much as digits as its factorization.

11128723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134164.

The product of its digits is 672, while the sum is 25.

The square root of 11128723 is about 3335.9740706426. The cubic root of 11128723 is about 223.2621542431.

The spelling of 11128723 in words is "eleven million, one hundred twenty-eight thousand, seven hundred twenty-three".