11903721 has 8 divisors (see below), whose sum is σ = 16383744. Its totient is φ = 7679760.

The previous prime is 11903707. The next prime is 11903729. The reversal of 11903721 is 12730911.

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

It is not a de Polignac number, because 11903721 - 2⁶ = 11903657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11903691 and 11903700.

It is not an unprimeable number, because it can be changed into a prime (11903729) 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, 63906 + ... + 64091.

It is an arithmetic number, because the mean of its divisors is an integer number (2047968).

Almost surely, 2^11903721 is an apocalyptic number.

It is an amenable number.

11903721 is a deficient number, since it is larger than the sum of its proper divisors (4480023).

11903721 is a wasteful number, since it uses less digits than its factorization.

11903721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128031.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 11903721 is about 3450.1769519838. The cubic root of 11903721 is about 228.3289150879.

The spelling of 11903721 in words is "eleven million, nine hundred three thousand, seven hundred twenty-one".