11623821 has 8 divisors (see below), whose sum is σ = 16907424. Its totient is φ = 7044720.

The previous prime is 11623819. The next prime is 11623837. The reversal of 11623821 is 12832611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11623821 - 2¹ = 11623819 is a prime.

It is a super-2 number, since 2×11623821² = 270226429280082, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11623791 and 11623800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11623861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176086 + ... + 176151.

It is an arithmetic number, because the mean of its divisors is an integer number (2113428).

Almost surely, 2^11623821 is an apocalyptic number.

11623821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11623821 is a deficient number, since it is larger than the sum of its proper divisors (5283603).

11623821 is a wasteful number, since it uses less digits than its factorization.

11623821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352251.

The product of its digits is 576, while the sum is 24.

The square root of 11623821 is about 3409.3725229139. The cubic root of 11623821 is about 226.5250862770.

The spelling of 11623821 in words is "eleven million, six hundred twenty-three thousand, eight hundred twenty-one".