1131623 has 4 divisors (see below), whose sum is σ = 1180848. Its totient is φ = 1082400.

The previous prime is 1131617. The next prime is 1131629. The reversal of 1131623 is 3261311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3261311 = 29 ⋅112459.

It is an interprime number because it is at equal distance from previous prime (1131617) and next prime (1131629).

It is a cyclic number.

It is not a de Polignac number, because 1131623 - 2¹² = 1127527 is a prime.

It is a super-2 number, since 2×1131623² = 2561141228258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131629) 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, 24578 + ... + 24623.

It is an arithmetic number, because the mean of its divisors is an integer number (295212).

2^1131623 is an apocalyptic number.

1131623 is a deficient number, since it is larger than the sum of its proper divisors (49225).

1131623 is an equidigital number, since it uses as much as digits as its factorization.

1131623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49224.

The product of its digits is 108, while the sum is 17.

The square root of 1131623 is about 1063.7777023420. Note that the first 4 decimals coincide. The cubic root of 1131623 is about 104.2078866910.

Adding to 1131623 its reverse (3261311), we get a palindrome (4392934).

The spelling of 1131623 in words is "one million, one hundred thirty-one thousand, six hundred twenty-three".