11990397 has 12 divisors (see below), whose sum is σ = 16523520. Its totient is φ = 7733880.

The previous prime is 11990371. The next prime is 11990401. The reversal of 11990397 is 79309911.

It is not a de Polignac number, because 11990397 - 2⁸ = 11990141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11990597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 804 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (1376960).

Almost surely, 2^11990397 is an apocalyptic number.

It is an amenable number.

11990397 is a deficient number, since it is larger than the sum of its proper divisors (4533123).

11990397 is an equidigital number, since it uses as much as digits as its factorization.

11990397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224 (or 4193 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 11990397 is about 3462.7152640666. The cubic root of 11990397 is about 228.8817617080.

The spelling of 11990397 in words is "eleven million, nine hundred ninety thousand, three hundred ninety-seven".