11899973 has 4 divisors (see below), whose sum is σ = 11927520. Its totient is φ = 11872428.

The previous prime is 11899969. The next prime is 11899981. The reversal of 11899973 is 37999811.

It is a happy number.

11899973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37999811 = 17 ⋅2235283.

It is a cyclic number.

It is not a de Polignac number, because 11899973 - 2² = 11899969 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 (11899913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13115 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (2981880).

Almost surely, 2^11899973 is an apocalyptic number.

It is an amenable number.

11899973 is a deficient number, since it is larger than the sum of its proper divisors (27547).

11899973 is an equidigital number, since it uses as much as digits as its factorization.

11899973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27546.

The product of its digits is 122472, while the sum is 47.

The square root of 11899973 is about 3449.6337486754. The cubic root of 11899973 is about 228.3049487274.

The spelling of 11899973 in words is "eleven million, eight hundred ninety-nine thousand, nine hundred seventy-three".