11956657 has 2 divisors, whose sum is σ = 11956658. Its totient is φ = 11956656.

The previous prime is 11956631. The next prime is 11956673. The reversal of 11956657 is 75665911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7134241 + 4822416 = 2671^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 11956657 - 2¹⁵ = 11923889 is a prime.

It is not a weakly prime, because it can be changed into another prime (11956687) 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, 5978328 + 5978329.

It is an arithmetic number, because the mean of its divisors is an integer number (5978329).

Almost surely, 2^11956657 is an apocalyptic number.

It is an amenable number.

11956657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11956657 is an equidigital number, since it uses as much as digits as its factorization.

11956657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 11956657 is about 3457.8399326747. The cubic root of 11956657 is about 228.6668751491. Note that the first 3 decimals are identical.

The spelling of 11956657 in words is "eleven million, nine hundred fifty-six thousand, six hundred fifty-seven".