1117823 has 16 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 892320.

The previous prime is 1117819. The next prime is 1117861. The reversal of 1117823 is 3287111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1117823 - 2² = 1117819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8468 + ... + 8598.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2^1117823 is an apocalyptic number.

1117823 is a deficient number, since it is larger than the sum of its proper divisors (250753).

1117823 is a wasteful number, since it uses less digits than its factorization.

1117823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its digits is 336, while the sum is 23.

The square root of 1117823 is about 1057.2714883132. The cubic root of 1117823 is about 103.7825523247.

The spelling of 1117823 in words is "one million, one hundred seventeen thousand, eight hundred twenty-three".