11921677 has 2 divisors, whose sum is σ = 11921678. Its totient is φ = 11921676.

The previous prime is 11921669. The next prime is 11921687. The reversal of 11921677 is 77612911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 972196 = 3309^2 + 986^2 .

It is an emirp because it is prime and its reverse (77612911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11921677 - 2³ = 11921669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11921687) 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, 5960838 + 5960839.

It is an arithmetic number, because the mean of its divisors is an integer number (5960839).

Almost surely, 2^11921677 is an apocalyptic number.

It is an amenable number.

11921677 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921677 is an equidigital number, since it uses as much as digits as its factorization.

11921677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 34.

The square root of 11921677 is about 3452.7781567891. The cubic root of 11921677 is about 228.4436639203.

The spelling of 11921677 in words is "eleven million, nine hundred twenty-one thousand, six hundred seventy-seven".