11969557 has 2 divisors, whose sum is σ = 11969558. Its totient is φ = 11969556.

The previous prime is 11969543. The next prime is 11969561. The reversal of 11969557 is 75596911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8532241 + 3437316 = 2921^2 + 1854^2 .

It is a cyclic number.

It is not a de Polignac number, because 11969557 - 2¹⁵ = 11936789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11969567) 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 as a sum of consecutive naturals, namely, 5984778 + 5984779.

It is an arithmetic number, because the mean of its divisors is an integer number (5984779).

Almost surely, 2^11969557 is an apocalyptic number.

It is an amenable number.

11969557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11969557 is an equidigital number, since it uses as much as digits as its factorization.

11969557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 43.

The square root of 11969557 is about 3459.7047561895. The cubic root of 11969557 is about 228.7490815853.

The spelling of 11969557 in words is "eleven million, nine hundred sixty-nine thousand, five hundred fifty-seven".