11921773 has 2 divisors, whose sum is σ = 11921774. Its totient is φ = 11921772.

The previous prime is 11921761. The next prime is 11921827. The reversal of 11921773 is 37712911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11377129 + 544644 = 3373^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 11921773 - 2¹³ = 11913581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11921713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960886 + 5960887.

It is an arithmetic number, because the mean of its divisors is an integer number (5960887).

Almost surely, 2^11921773 is an apocalyptic number.

It is an amenable number.

11921773 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921773 is an equidigital number, since it uses as much as digits as its factorization.

11921773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 31.

The square root of 11921773 is about 3452.7920586100. The cubic root of 11921773 is about 228.4442771040. Note that the first 3 decimals are identical.

The spelling of 11921773 in words is "eleven million, nine hundred twenty-one thousand, seven hundred seventy-three".