11899823 has 8 divisors (see below), whose sum is σ = 12849648. Its totient is φ = 10954944.

The previous prime is 11899817. The next prime is 11899837. The reversal of 11899823 is 32899811.

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

It is not a de Polignac number, because 11899823 - 2⁶ = 11899759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11899843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4940 + ... + 6942.

It is an arithmetic number, because the mean of its divisors is an integer number (1606206).

Almost surely, 2^11899823 is an apocalyptic number.

11899823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11899823 is a deficient number, since it is larger than the sum of its proper divisors (949825).

11899823 is a wasteful number, since it uses less digits than its factorization.

11899823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its digits is 31104, while the sum is 41.

The square root of 11899823 is about 3449.6120071683. The cubic root of 11899823 is about 228.3039894567.

The spelling of 11899823 in words is "eleven million, eight hundred ninety-nine thousand, eight hundred twenty-three".