1131923 has 4 divisors (see below), whose sum is σ = 1219008. Its totient is φ = 1044840.

The previous prime is 1131919. The next prime is 1131937. The reversal of 1131923 is 3291311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131923 - 2² = 1131919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131895 and 1131904.

It is not an unprimeable number, because it can be changed into a prime (1131913) 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, 43523 + ... + 43548.

It is an arithmetic number, because the mean of its divisors is an integer number (304752).

2^1131923 is an apocalyptic number.

1131923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1131923 is a deficient number, since it is larger than the sum of its proper divisors (87085).

1131923 is an equidigital number, since it uses as much as digits as its factorization.

1131923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87084.

The product of its digits is 162, while the sum is 20.

The square root of 1131923 is about 1063.9186999015. The cubic root of 1131923 is about 104.2170945879.

It can be divided in two parts, 11 and 31923, that multiplied together give a palindrome (351153).

The spelling of 1131923 in words is "one million, one hundred thirty-one thousand, nine hundred twenty-three".