11806997 has 2 divisors, whose sum is σ = 11806998. Its totient is φ = 11806996.

The previous prime is 11806967. The next prime is 11807009. The reversal of 11806997 is 79960811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11792356 + 14641 = 3434^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 11806997 - 2⁶ = 11806933 is a prime.

It is a super-3 number, since 3×11806997³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11806957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5903498 + 5903499.

It is an arithmetic number, because the mean of its divisors is an integer number (5903499).

Almost surely, 2^11806997 is an apocalyptic number.

It is an amenable number.

11806997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11806997 is an equidigital number, since it uses as much as digits as its factorization.

11806997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 11806997 is about 3436.1311092565. The cubic root of 11806997 is about 227.7088015792.

The spelling of 11806997 in words is "eleven million, eight hundred six thousand, nine hundred ninety-seven".