11405983 has 2 divisors, whose sum is σ = 11405984. Its totient is φ = 11405982.

The previous prime is 11405981. The next prime is 11405987. The reversal of 11405983 is 38950411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11405983 - 2¹ = 11405981 is a prime.

Together with 11405981, it forms a pair of twin primes.

It is equal to p₇₅₁₄₉₅ and since 11405983 and 751495 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11405981) 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 as a sum of consecutive naturals, namely, 5702991 + 5702992.

It is an arithmetic number, because the mean of its divisors is an integer number (5702992).

Almost surely, 2^11405983 is an apocalyptic number.

11405983 is a deficient number, since it is larger than the sum of its proper divisors (1).

11405983 is an equidigital number, since it uses as much as digits as its factorization.

11405983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 11405983 is about 3377.2744928418. The cubic root of 11405983 is about 225.1010772198.

The spelling of 11405983 in words is "eleven million, four hundred five thousand, nine hundred eighty-three".