11997397 has 2 divisors, whose sum is σ = 11997398. Its totient is φ = 11997396.

The previous prime is 11997383. The next prime is 11997409. The reversal of 11997397 is 79379911.

11997397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9205156 + 2792241 = 3034^2 + 1671^2 .

It is a cyclic number.

It is not a de Polignac number, because 11997397 - 2⁷ = 11997269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11997347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998698 + 5998699.

It is an arithmetic number, because the mean of its divisors is an integer number (5998699).

Almost surely, 2^11997397 is an apocalyptic number.

It is an amenable number.

11997397 is a deficient number, since it is larger than the sum of its proper divisors (1).

11997397 is an equidigital number, since it uses as much as digits as its factorization.

11997397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163, while the sum is 46.

The square root of 11997397 is about 3463.7258840734. The cubic root of 11997397 is about 228.9262934737.

The spelling of 11997397 in words is "eleven million, nine hundred ninety-seven thousand, three hundred ninety-seven".